[wp-trac] [WordPress Trac] #51442: Cannot add youtube links since Gutenberg update to 9.1.0

[WordPress Trac]

#51442: Cannot add youtube links since Gutenberg update to 9.1.0
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 Reporter:  yeoric        |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  General       |     Version:  5.5.1
 Severity:  major         |  Resolution:
 Keywords:                |     Focuses:
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Comment (by yeoric):

 I got a confirmation from STRATO. The main point was that their
 abovementioned spam filter replies with a 503 "Service unavailable"
 message in cases of suspected spam. But in the WP/Gutenberg editor GUI
 this comes back to me as the JSON error mentioned above. It looks like my
 initial assumption about a completely misleading error meessage was not
 very far off the mark. A 503 message would have put me right on track
 where to look, i. e. at the hosting server.

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Ticket URL: <https://core.trac.wordpress.org/ticket/51442#comment:7>
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