[wp-trac] [WordPress Trac] #45172: Custom meta boxes do not show up

[WordPress Trac]

#45172: Custom meta boxes do not show up
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 Reporter:  zodiac1978    |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Editor        |     Version:  5.0
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Changes (by zodiac1978):

 * Attachment "Bildschirmfoto 2018-10-24 um 22.34.32.png" added.

 With Gutenberg plugin active the custom meta boxes appear (and an
 unexptected error message)

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Ticket URL: <https://core.trac.wordpress.org/ticket/45172>
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