[wp-trac] [WordPress Trac] #52917: Error updating posts

[WordPress Trac]

#52917: Error updating posts
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 Reporter:  toxictree     |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Editor        |    Version:  5.7
 Severity:  critical      |   Keywords:
  Focuses:                |
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 It's not possible to update posts.

 Translated from Swedish: "Failed to update post, the response is not a
 valid JSON-response"

 Unhandled Promise Rejection: [object Object]
 dispatchException - wp-polyfill.min.js

 Happens in any browser (Chrome/Safari) used on a MAC (OSX 11.2.3) but
 works in Windows.

 We tried to disable all plugins and use the default-theme with no luck,
 that is why I am sending a bug-report here because it seem to have
 something to do with WordPress itself.

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Ticket URL: <https://core.trac.wordpress.org/ticket/52917>
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