[wp-trac] [WordPress Trac] #54762: Site breaking if "full-site-editing" tag in use and Gutenberg plugin disabled

[WordPress Trac]

#54762: Site breaking if "full-site-editing" tag in use and Gutenberg plugin
disabled
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 Reporter:  ajcreate      |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Customize     |     Version:  5.8.2
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by costdev):

 Hi @ajcreate, thanks for opening this ticket and welcome to Trac!

 == Test Report

 === Env
 * WordPress 5.8.3 and 5.9 RC1
 * Chrome 97.0.4692.71
 * Windows 10
 * Theme: Twenty Twenty-One
 * Plugin: None activated

 === Steps to test
 1. Navigate to `Appearance > Customize`.
 2. The "Publish" button should be visible.
 3. Add `full-site-editing` to `Tags` in Twenty Twenty-One's `style.css`.
 4. Refresh the Customize screen.
 5. The "Publish" button has been replaced by "Cannot Activate".

 === Results
 - Reproduced on 5.8.3.
 - Cannot reproduce in 5.9 RC1. This appears to have been fixed in 5.9.

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Ticket URL: <https://core.trac.wordpress.org/ticket/54762#comment:1>
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