BlockSuiteError: val does not exist

[sentry-io]

Sentry Issue: AFFINE-6TY

BlockSuiteError: val does not exist
  at assertExists (webpack://@affine/web/../../../node_modules/@blocksuite/global/src/utils/assert.ts:21:11)
  at get _blockElement (webpack://@affine/web/../../../node_modules/@blocksuite/blocks/src/root-block/widgets/element-toolbar/change-embed-card-button.ts:262:5)
  at _openMenuButton (webpack://@affine/web/../../../node_modules/@blocksuite/blocks/src/root-block/widgets/element-toolbar/change-embed-card-button.ts:401:14)
  at render (webpack://@affine/web/../../../node_modules/@blocksuite/blocks/src/root-block/widgets/element-toolbar/change-embed-card-button.ts:609:12)
  at s.update (webpack://@affine/web/../../../node_modules/lit/node_modules/lit-element/lit-element.js:6:235)
...
(3 additional frame(s) were not displayed)