Allowing the user to customize the media view modes that the user can select in the WYSIWYG unexpectedly creates a hard configuration dependency on the media view mode for the HTML format itself, even if the view mode is never used.
/admin/structure/display-modes/view/add/media/, create a new view mode for Media called "Test" and click save./admin/structure/media/manage/image/display, under "Custom display settings", check "Test" and click save./admin/config/content/formats/manage/basic_html, add the media button to the WYSIWYG toolbar./admin/structure/display-modes/view/manage/media.test/delete. It warns you that not only the unused view mode but also the editor config and the basic HTML input format are about to be deleted:The selectable view modes for the media embed button should be treated as optional third-party settings that can be cleaned up from the editor and filter config entities, especially if they are never used. (Even if they are used, it'd be better to ignore a single data attribute rather than break the entire site's content.)
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Needs work
11.0 🔥
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
When i keep the checkbox Allow the user to override the default view mode checked i am not getting the error .
Following the steps of the IS can confirm the bug still on 11.x