[wp-trac] [WordPress Trac] #53789: all kinds of error messages using WordPress 5.8 Widgets block editor

[WordPress Trac]

#53789: all kinds of error messages using WordPress 5.8 Widgets block editor
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 Reporter:  janecarole    |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  5.8
 Severity:  major         |   Keywords:
  Focuses:                |
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 After the Upgrade to WordPress 5.8, in the backend when I choose
 Appearance / Widgets (to edit widgets), I get error messages like these:

 The "blog_subscription" block was affected by errors and may not function
 properly. Check the developer tools for more details.
 The "google_translate_widget" block was affected by errors and may not
 function properly. Check the developer tools for more details.
 The "recent-posts" block was affected by errors and may not function
 properly. Check the developer tools for more details.
 The "text" block was affected by errors and may not function properly.
 Check the developer tools for more details.
 The "nav_menu" block was affected by errors and may not function properly.
 Check the developer tools for more details.
 The "text" block was affected by errors and may not function properly.
 Check the developer tools for more details.
 The "text" block was affected by errors and may not function properly.
 Check the developer tools for more details.
 The "text" block was affected by errors and may not function properly.
 Check the developer tools for more details.
 The "text" block was affected by errors and may not function properly.
 Check the developer tools for more details.
 The "text" block was affected by errors and may not function properly.
 Check the developer tools for more details.
 The "bbpmmymessages" block was affected by errors and may not function
 properly. Check the developer tools for more details.
 The "text" block was affected by errors and may not function properly.
 Check the developer tools for more details.
 The "search" block was affected by errors and may not function properly.
 Check the developer tools for more details.

 I installed and activated the Classic Widget Editor plugin so I could
 function. Later (after an update from one of the Widget providers), I
 deactivated the CWE plugin so I could see if this provider's widgets were
 now working with the 5.8 Widget block editor. (Some were fixed, some
 weren't). Unbelievably, though, I got more errors than before showing that
 widget blocks which seemed to be working before now were not working! I
 got a lot of Internal Error messages, whereas before I only saw one or two
 of these. Did switching to the Classic Widget Editor and then deactivating
 cause more problems? Now every time I try to access the 5.8 Widgets block
 editing, I get new or different errors. Very confusing and upsetting.

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Ticket URL: <https://core.trac.wordpress.org/ticket/53789>
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