diff --git a/blocksuite/affine/blocks/block-code/src/code-toolbar/index.ts b/blocksuite/affine/blocks/block-code/src/code-toolbar/index.ts
index 673559d85b..29f72c694f 100644
--- a/blocksuite/affine/blocks/block-code/src/code-toolbar/index.ts
+++ b/blocksuite/affine/blocks/block-code/src/code-toolbar/index.ts
@@ -35,6 +35,10 @@ export class AffineCodeToolbarWidget extends WidgetComponent<
       this,
       ({ abortController }) => {
         const codeBlock = this.block;
+        if (!codeBlock) {
+          return null;
+        }
+
         const selection = this.host.selection;
 
         const textSelection = selection.find(TextSelection);
@@ -105,6 +109,9 @@ export class AffineCodeToolbarWidget extends WidgetComponent<
     );
 
     const codeBlock = this.block;
+    if (!codeBlock) {
+      return;
+    }
     this._hoverController.setReference(codeBlock);
     this._hoverController.onAbort = () => {
       // If the more menu is opened, don't close it.
diff --git a/blocksuite/affine/blocks/block-root/src/edgeless/components/note-slicer/index.ts b/blocksuite/affine/blocks/block-root/src/edgeless/components/note-slicer/index.ts
index 79f27f61bc..d588969c32 100644
--- a/blocksuite/affine/blocks/block-root/src/edgeless/components/note-slicer/index.ts
+++ b/blocksuite/affine/blocks/block-root/src/edgeless/components/note-slicer/index.ts
@@ -143,7 +143,7 @@ export class NoteSlicer extends WidgetComponent<
   }
 
   get selectedRectEle() {
-    return this.block.selectedRectWidget;
+    return this.block?.selectedRectWidget;
   }
 
   private _sliceNote() {
@@ -266,6 +266,10 @@ export class NoteSlicer extends WidgetComponent<
 
     this._updateDivingLineAndBlockIds();
 
+    if (!block) {
+      return;
+    }
+
     disposables.add(
       block.slots.elementResizeStart.subscribe(() => {
         this._isResizing = true;
@@ -343,7 +347,7 @@ export class NoteSlicer extends WidgetComponent<
   }
 
   override firstUpdated() {
-    if (!this.block.service) return;
+    if (!this.block?.service) return;
     this.disposables.add(
       this.block.service.uiEventDispatcher.add('wheel', () => {
         this._hidden = true;
diff --git a/blocksuite/affine/blocks/block-root/src/edgeless/components/rects/edgeless-dragging-area-rect.ts b/blocksuite/affine/blocks/block-root/src/edgeless/components/rects/edgeless-dragging-area-rect.ts
index 563f5a84e1..17facc2f3d 100644
--- a/blocksuite/affine/blocks/block-root/src/edgeless/components/rects/edgeless-dragging-area-rect.ts
+++ b/blocksuite/affine/blocks/block-root/src/edgeless/components/rects/edgeless-dragging-area-rect.ts
@@ -33,6 +33,9 @@ export class EdgelessDraggingAreaRectWidget extends WidgetComponent<
   `;
 
   override render() {
+    if (!this.block) {
+      return nothing;
+    }
     const rect = this.block.gfx.tool.draggingViewArea$.value;
     const tool = this.block.gfx.tool.currentTool$.value;
 
diff --git a/blocksuite/affine/blocks/block-root/src/edgeless/components/rects/edgeless-selected-rect.ts b/blocksuite/affine/blocks/block-root/src/edgeless/components/rects/edgeless-selected-rect.ts
index 9019df4d01..1d64076732 100644
--- a/blocksuite/affine/blocks/block-root/src/edgeless/components/rects/edgeless-selected-rect.ts
+++ b/blocksuite/affine/blocks/block-root/src/edgeless/components/rects/edgeless-selected-rect.ts
@@ -477,7 +477,7 @@ export class EdgelessSelectedRectWidget extends WidgetComponent<
     this._scaleDirection = undefined;
     this._updateMode();
 
-    this.block.slots.elementResizeEnd.next();
+    this.block?.slots.elementResizeEnd.next();
 
     this.frameOverlay.clear();
   };
@@ -606,7 +606,7 @@ export class EdgelessSelectedRectWidget extends WidgetComponent<
     const rotation = this._resizeManager.rotation;
 
     this._dragEndCallback = [];
-    this.block.slots.elementResizeStart.next();
+    this.block?.slots.elementResizeStart.next();
     this.selection.selectedElements.forEach(el => {
       el.stash('xywh');
 
@@ -846,7 +846,7 @@ export class EdgelessSelectedRectWidget extends WidgetComponent<
   }
 
   get edgelessSlots() {
-    return this.block.slots;
+    return this.block?.slots;
   }
 
   get frameOverlay() {
@@ -1327,41 +1327,46 @@ export class EdgelessSelectedRectWidget extends WidgetComponent<
       selection.slots.updated.subscribe(this._updateOnSelectionChange)
     );
 
-    _disposables.add(
-      block.slots.readonlyUpdated.subscribe(() => this.requestUpdate())
-    );
+    if (block) {
+      _disposables.add(
+        block.slots.readonlyUpdated.subscribe(() => this.requestUpdate())
+      );
+
+      _disposables.add(
+        block.slots.elementResizeStart.subscribe(
+          () => (this._isResizing = true)
+        )
+      );
+      _disposables.add(
+        block.slots.elementResizeEnd.subscribe(() => (this._isResizing = false))
+      );
+
+      block.handleEvent(
+        'keyDown',
+        ctx => {
+          const event = ctx.get('defaultState').event;
+          if (event instanceof KeyboardEvent) {
+            this._shift(event);
+          }
+        },
+        { global: true }
+      );
+
+      block.handleEvent(
+        'keyUp',
+        ctx => {
+          const event = ctx.get('defaultState').event;
+          if (event instanceof KeyboardEvent) {
+            this._shift(event);
+          }
+        },
+        { global: true }
+      );
+    }
 
-    _disposables.add(
-      block.slots.elementResizeStart.subscribe(() => (this._isResizing = true))
-    );
-    _disposables.add(
-      block.slots.elementResizeEnd.subscribe(() => (this._isResizing = false))
-    );
     _disposables.add(() => {
       this._propDisposables.forEach(disposable => disposable.unsubscribe());
     });
-
-    this.block.handleEvent(
-      'keyDown',
-      ctx => {
-        const event = ctx.get('defaultState').event;
-        if (event instanceof KeyboardEvent) {
-          this._shift(event);
-        }
-      },
-      { global: true }
-    );
-
-    this.block.handleEvent(
-      'keyUp',
-      ctx => {
-        const event = ctx.get('defaultState').event;
-        if (event instanceof KeyboardEvent) {
-          this._shift(event);
-        }
-      },
-      { global: true }
-    );
   }
 
   private _shift(event: KeyboardEvent) {
diff --git a/blocksuite/affine/blocks/block-root/src/edgeless/components/toolbar/edgeless-toolbar.ts b/blocksuite/affine/blocks/block-root/src/edgeless/components/toolbar/edgeless-toolbar.ts
index 4838c96bec..6e0803bc70 100644
--- a/blocksuite/affine/blocks/block-root/src/edgeless/components/toolbar/edgeless-toolbar.ts
+++ b/blocksuite/affine/blocks/block-root/src/edgeless/components/toolbar/edgeless-toolbar.ts
@@ -335,6 +335,9 @@ export class EdgelessToolbarWidget extends WidgetComponent<
   }
 
   private get _quickTools() {
+    if (!this.block) {
+      return [];
+    }
     return getQuickTools({ edgeless: this.block });
   }
 
@@ -376,6 +379,9 @@ export class EdgelessToolbarWidget extends WidgetComponent<
   }
 
   private get _seniorTools() {
+    if (!this.block) {
+      return [];
+    }
     return getSeniorTools({
       edgeless: this.block,
       toolbarContainer: this.toolbarContainer,
@@ -573,6 +579,9 @@ export class EdgelessToolbarWidget extends WidgetComponent<
         .get(ThemeProvider)
         .theme$.subscribe(mode => this._themeProvider.setValue(mode))
     );
+    if (!this.block) {
+      return;
+    }
     this._disposables.add(
       this.block.bindHotKey(
         {
@@ -603,6 +612,9 @@ export class EdgelessToolbarWidget extends WidgetComponent<
 
   override firstUpdated() {
     const { _disposables, block, gfx } = this;
+    if (!block) {
+      return;
+    }
 
     _disposables.add(
       gfx.viewport.viewportUpdated.subscribe(() => this.requestUpdate())
diff --git a/blocksuite/affine/blocks/block-root/src/widgets/edgeless-zoom-toolbar/index.ts b/blocksuite/affine/blocks/block-root/src/widgets/edgeless-zoom-toolbar/index.ts
index 8140623e17..f0dcb24352 100644
--- a/blocksuite/affine/blocks/block-root/src/widgets/edgeless-zoom-toolbar/index.ts
+++ b/blocksuite/affine/blocks/block-root/src/widgets/edgeless-zoom-toolbar/index.ts
@@ -48,7 +48,7 @@ export class AffineEdgelessZoomToolbarWidget extends WidgetComponent<
 
     this.disposables.add(
       effect(() => {
-        const currentTool = this.edgeless.gfx.tool.currentToolName$.value;
+        const currentTool = this.edgeless?.gfx.tool.currentToolName$.value;
 
         if (currentTool !== 'frameNavigator') {
           this._hide = false;
diff --git a/blocksuite/affine/blocks/block-root/src/widgets/image-toolbar/index.ts b/blocksuite/affine/blocks/block-root/src/widgets/image-toolbar/index.ts
index 342190d3bf..e89b85bc68 100644
--- a/blocksuite/affine/blocks/block-root/src/widgets/image-toolbar/index.ts
+++ b/blocksuite/affine/blocks/block-root/src/widgets/image-toolbar/index.ts
@@ -37,6 +37,9 @@ export class AffineImageToolbarWidget extends WidgetComponent<
       this,
       ({ abortController }) => {
         const imageBlock = this.block;
+        if (!imageBlock) {
+          return null;
+        }
         const selection = this.host.selection;
 
         const textSelection = selection.find(TextSelection);
@@ -103,6 +106,9 @@ export class AffineImageToolbarWidget extends WidgetComponent<
     );
 
     const imageBlock = this.block;
+    if (!imageBlock) {
+      return;
+    }
     this._hoverController.setReference(imageBlock);
     this._hoverController.onAbort = () => {
       // If the more menu is opened, don't close it.
diff --git a/blocksuite/affine/blocks/block-root/src/widgets/keyboard-toolbar/index.ts b/blocksuite/affine/blocks/block-root/src/widgets/keyboard-toolbar/index.ts
index cd68e7cb48..82680bf5e4 100644
--- a/blocksuite/affine/blocks/block-root/src/widgets/keyboard-toolbar/index.ts
+++ b/blocksuite/affine/blocks/block-root/src/widgets/keyboard-toolbar/index.ts
@@ -22,7 +22,7 @@ export class AffineKeyboardToolbarWidget extends WidgetComponent<
     if (blur) {
       if (document.activeElement === this._docTitle?.inlineEditorContainer) {
         this._docTitle?.inlineEditor?.setInlineRange(null);
-      } else if (document.activeElement === this.block.rootComponent) {
+      } else if (document.activeElement === this.block?.rootComponent) {
         this.std.selection.clear();
       }
     }
@@ -46,7 +46,7 @@ export class AffineKeyboardToolbarWidget extends WidgetComponent<
   override connectedCallback(): void {
     super.connectedCallback();
 
-    const { rootComponent } = this.block;
+    const rootComponent = this.block?.rootComponent;
     if (rootComponent) {
       this.disposables.addFromEvent(rootComponent, 'focus', () => {
         this._show$.value = true;
@@ -79,7 +79,7 @@ export class AffineKeyboardToolbarWidget extends WidgetComponent<
 
     if (!this._show$.value) return nothing;
 
-    if (!this.block.rootComponent) return nothing;
+    if (!this.block?.rootComponent) return nothing;
 
     return html`<blocksuite-portal
       .shadowDom=${false}
diff --git a/blocksuite/affine/blocks/block-root/src/widgets/linked-doc/index.ts b/blocksuite/affine/blocks/block-root/src/widgets/linked-doc/index.ts
index 01fb85931f..9a1ffa40ff 100644
--- a/blocksuite/affine/blocks/block-root/src/widgets/linked-doc/index.ts
+++ b/blocksuite/affine/blocks/block-root/src/widgets/linked-doc/index.ts
@@ -72,7 +72,7 @@ export class AffineLinkedDocWidget extends WidgetComponent<
   }
 
   private readonly _renderLinkedDocMenu = () => {
-    if (!this.block.rootComponent) return nothing;
+    if (!this.block?.rootComponent) return nothing;
 
     return html`<affine-mobile-linked-doc-menu
       .context=${this._context}
diff --git a/blocksuite/affine/blocks/block-root/src/widgets/page-dragging-area/page-dragging-area.ts b/blocksuite/affine/blocks/block-root/src/widgets/page-dragging-area/page-dragging-area.ts
index eb54d998ec..3998d18400 100644
--- a/blocksuite/affine/blocks/block-root/src/widgets/page-dragging-area/page-dragging-area.ts
+++ b/blocksuite/affine/blocks/block-root/src/widgets/page-dragging-area/page-dragging-area.ts
@@ -114,7 +114,7 @@ export class AffinePageDraggingAreaWidget extends WidgetComponent<
     });
     this._lastPointerState = state;
 
-    if (shouldAutoScroll) {
+    if (shouldAutoScroll && this.scrollContainer) {
       const rect = this.scrollContainer.getBoundingClientRect();
       const result = autoScroll(this.scrollContainer, state.raw.y - rect.top);
       if (!result) {
@@ -173,6 +173,9 @@ export class AffinePageDraggingAreaWidget extends WidgetComponent<
   }
 
   private get scrollContainer() {
+    if (!this.block) {
+      return null;
+    }
     return getScrollContainer(this.block);
   }
 
diff --git a/blocksuite/affine/blocks/block-root/src/widgets/surface-ref-toolbar/surface-ref-toolbar.ts b/blocksuite/affine/blocks/block-root/src/widgets/surface-ref-toolbar/surface-ref-toolbar.ts
index 40a6fc69f2..2b92146309 100644
--- a/blocksuite/affine/blocks/block-root/src/widgets/surface-ref-toolbar/surface-ref-toolbar.ts
+++ b/blocksuite/affine/blocks/block-root/src/widgets/surface-ref-toolbar/surface-ref-toolbar.ts
@@ -49,6 +49,9 @@ export class AffineSurfaceRefToolbar extends WidgetComponent<
     this,
     ({ abortController }) => {
       const surfaceRefBlock = this.block;
+      if (!surfaceRefBlock) {
+        return null;
+      }
       const selection = this.host.selection;
 
       const textSelection = selection.find(TextSelection);
@@ -100,6 +103,9 @@ export class AffineSurfaceRefToolbar extends WidgetComponent<
     super.connectedCallback();
 
     this.moreGroups = getMoreMenuConfig(this.std).configure(this.moreGroups);
+    if (!this.block) {
+      return;
+    }
     this._hoverController.setReference(this.block);
   }
 }
diff --git a/blocksuite/affine/widgets/widget-drag-handle/src/watchers/pointer-event-watcher.ts b/blocksuite/affine/widgets/widget-drag-handle/src/watchers/pointer-event-watcher.ts
index e72839be45..39284bc7db 100644
--- a/blocksuite/affine/widgets/widget-drag-handle/src/watchers/pointer-event-watcher.ts
+++ b/blocksuite/affine/widgets/widget-drag-handle/src/watchers/pointer-event-watcher.ts
@@ -161,6 +161,8 @@ export class PointerEventWatcher {
     if (this.widget.isGfxDragHandleVisible) return;
 
     const point = new Point(state.raw.x, state.raw.y);
+    if (!this.widget.rootComponent) return;
+
     const closestBlock = getClosestBlockByPoint(
       this.widget.host,
       this.widget.rootComponent,
@@ -246,6 +248,8 @@ export class PointerEventWatcher {
       // When pointer on drag handle, should do nothing
       if (element.closest('.affine-drag-handle-container')) return;
 
+      if (!this.widget.rootComponent) return;
+
       // When pointer out of note block hover area or inside database, should hide drag handle
       const point = new Point(state.raw.x, state.raw.y);
 
diff --git a/blocksuite/affine/widgets/widget-edgeless-auto-connect/src/index.ts b/blocksuite/affine/widgets/widget-edgeless-auto-connect/src/index.ts
index ff0d071448..12d09ddded 100644
--- a/blocksuite/affine/widgets/widget-edgeless-auto-connect/src/index.ts
+++ b/blocksuite/affine/widgets/widget-edgeless-auto-connect/src/index.ts
@@ -284,6 +284,9 @@ export class EdgelessAutoConnectWidget extends WidgetComponent<RootBlockModel> {
   }
 
   private _initLabels() {
+    if (!this.block) {
+      return;
+    }
     const { service } = this.block;
     const surfaceRefs = service.doc
       .getBlocksByFlavour('affine:surface-ref')
diff --git a/blocksuite/affine/widgets/widget-remote-selection/src/doc/doc-remote-selection.ts b/blocksuite/affine/widgets/widget-remote-selection/src/doc/doc-remote-selection.ts
index c6ee41762d..8d52bee02e 100644
--- a/blocksuite/affine/widgets/widget-remote-selection/src/doc/doc-remote-selection.ts
+++ b/blocksuite/affine/widgets/widget-remote-selection/src/doc/doc-remote-selection.ts
@@ -144,6 +144,10 @@ export class AffineDocRemoteSelectionWidget extends WidgetComponent {
   }
 
   private _getCursorRect(selections: BaseSelection[]): SelectionRect | null {
+    if (!this.block) {
+      return null;
+    }
+
     if (this.block.model.flavour !== 'affine:page') {
       console.error('remote selection widget must be used in page component');
       return null;
@@ -208,6 +212,10 @@ export class AffineDocRemoteSelectionWidget extends WidgetComponent {
   private readonly _getSelectionRect = (
     selections: BaseSelection[]
   ): SelectionRect[] => {
+    if (!this.block) {
+      return [];
+    }
+
     if (this.block.model.flavour !== 'affine:page') {
       console.error('remote selection widget must be used in page component');
       return [];
diff --git a/blocksuite/affine/widgets/widget-slash-menu/src/widget.ts b/blocksuite/affine/widgets/widget-slash-menu/src/widget.ts
index 07042278b6..22dd4a11b9 100644
--- a/blocksuite/affine/widgets/widget-slash-menu/src/widget.ts
+++ b/blocksuite/affine/widgets/widget-slash-menu/src/widget.ts
@@ -105,7 +105,7 @@ export class AffineSlashMenuWidget extends WidgetComponent {
       }
     };
 
-    if (this.block.model.flavour !== 'affine:page') {
+    if (this.block?.model.flavour !== 'affine:page') {
       console.error('SlashMenuWidget should be used in RootBlock');
       return;
     }
diff --git a/blocksuite/framework/block-std/src/view/element/widget-component.ts b/blocksuite/framework/block-std/src/view/element/widget-component.ts
index 8121f5405d..cb88544e6f 100644
--- a/blocksuite/framework/block-std/src/view/element/widget-component.ts
+++ b/blocksuite/framework/block-std/src/view/element/widget-component.ts
@@ -28,7 +28,7 @@ export class WidgetComponent<
   };
 
   get block() {
-    return this.std.view.getBlock(this.model.id) as B;
+    return this.std.view.getBlock(this.model.id) as B | null;
   }
 
   get doc() {
diff --git a/packages/frontend/core/src/blocksuite/ai/widgets/ai-panel/ai-panel.ts b/packages/frontend/core/src/blocksuite/ai/widgets/ai-panel/ai-panel.ts
index e1f5f04c87..e22e662884 100644
--- a/packages/frontend/core/src/blocksuite/ai/widgets/ai-panel/ai-panel.ts
+++ b/packages/frontend/core/src/blocksuite/ai/widgets/ai-panel/ai-panel.ts
@@ -424,18 +424,20 @@ export class AffineAIPanelWidget extends WidgetComponent {
       'pointerdown',
       this._onDocumentClick
     );
-    this.disposables.add(
-      this.block.host.event.add('pointerDown', evtState =>
-        this._onDocumentClick(
-          evtState.get('pointerState').event as PointerEvent
+    if (this.block) {
+      this.disposables.add(
+        this.block.host.event.add('pointerDown', evtState =>
+          this._onDocumentClick(
+            evtState.get('pointerState').event as PointerEvent
+          )
         )
-      )
-    );
-    this.disposables.add(
-      this.block.host.event.add('click', () => {
-        return this.state !== 'hidden' ? true : false;
-      })
-    );
+      );
+      this.disposables.add(
+        this.block.host.event.add('click', () => {
+          return this.state !== 'hidden' ? true : false;
+        })
+      );
+    }
     this.disposables.addFromEvent(this, 'wheel', stopPropagation);
     this.disposables.addFromEvent(this, 'pointerdown', stopPropagation);
     this.disposables.addFromEvent(this, 'pointerup', stopPropagation);