[wp-trac] [WordPress Trac] #40954: Create Category within posts screen error

[WordPress Trac]

#40954: Create Category within posts screen error
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 Reporter:  cfastenrath        |       Owner:  (none)
     Type:  defect (bug)       |      Status:  closed
 Priority:  normal             |   Milestone:
Component:  Posts, Post Types  |     Version:  4.8
 Severity:  normal             |  Resolution:  invalid
 Keywords:  close              |     Focuses:  javascript
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Comment (by ahtishamdec):

 Replying to [comment:1 cfastenrath]:
 > There were additional lines after the closing php tag in an uploaded
 file in the plugin folder.
 > Therefore headers were already sent which results in this error!.
 >
 Certainly! Here are four different short answers:

 JavaScript Conflict: This issue is likely due to a JavaScript bug in
 WordPress 4.8, causing the new category to require a refresh to display.
 Updating WordPress to the latest version may resolve this.

 AJAX Glitch: WordPress 4.8 has an AJAX glitch where new categories created
 in the post editor aren’t displayed immediately. Refreshing or updating
 WordPress should help fix this.

 Bug in Version 4.8: This is a known bug in WordPress 4.8 where categories
 don’t show up right away due to JavaScript issues. An update should
 correct the problem.

 Default Theme Issue: Even with default themes and plugins, WordPress 4.8
 has a category refresh issue on the post screen. Try updating to see if it
 fixes the AJAX error.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40954#comment:3>
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