[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 saibaathasir):

 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!.
 >
 This error happens when there are unintended characters or lines after the
 closing ?> PHP tag in the file. Removing any extra lines or spaces after
 the closing tag should resolve the issue.

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