[wp-trac] [WordPress Trac] #63396: Warning messages appear in UI the Appearance Editor when we activate Gutenberg

[WordPress Trac]

#63396: Warning messages appear in UI the Appearance Editor when we activate
Gutenberg
--------------------------+--------------------------------
 Reporter:  amitbhosale   |       Owner:  (none)
     Type:  defect (bug)  |      Status:  closed
 Priority:  normal        |   Milestone:
Component:  Editor        |     Version:
 Severity:  normal        |  Resolution:  reported-upstream
 Keywords:                |     Focuses:
--------------------------+--------------------------------
Changes (by sabernhardt):

 * milestone:  Awaiting Review =>


Old description:

> Got one Warning message in the Twenty Twenty-Five theme while opening in
> Appearance>Editor
> I've activated Guteneberg Plugin and got the above error
> WordPress Version - 6.8.1
> PHP Version - 8.2
> WordPress Studio
>
> Screenshot :
>
> Warning:  Cannot modify header information - headers already sent by
> (output started at /var/www/html/wp-
> content/plugins/gutenberg/lib/compat/wordpress-6.8/site-editor.php:30) in
> /var/www/html/wp-includes/functions.php
> 2:31
> Warning:  Cannot modify header information - headers already sent by
> (output started at /var/www/html/wp-
> content/plugins/gutenberg/lib/compat/wordpress-6.8.1/site-editor.php:30)
> in /var/www/html/wp-includes/functions.php
> Warning:  Cannot modify header information - headers already sent by
> (output started at /var/www/html/wp-
> content/plugins/gutenberg/lib/compat/wordpress-6.8/site-editor.php:30) in
> /var/www/html/wp-admin/admin-header.php

New description:

 Got one Warning message in the Twenty Twenty-Five theme while opening in
 Appearance>Editor
 I've activated Gutenberg Plugin and got the above error
 WordPress Version - 6.8.1
 PHP Version - 8.2
 WordPress Studio

 Screenshot :
 {{{
 Warning:  Cannot modify header information - headers already sent by
 (output started at /.../wp-
 content/plugins/gutenberg/lib/compat/wordpress-6.8/site-editor.php:30) in
 /.../wp-includes/functions.php
 2:31
 Warning:  Cannot modify header information - headers already sent by
 (output started at /.../wp-
 content/plugins/gutenberg/lib/compat/wordpress-6.8.1/site-editor.php:30)
 in /.../wp-includes/functions.php
 Warning:  Cannot modify header information - headers already sent by
 (output started at /.../wp-
 content/plugins/gutenberg/lib/compat/wordpress-6.8/site-editor.php:30) in
 /.../wp-admin/admin-header.php
 }}}

--

Comment:

 Thanks for moving the report!

 https://github.com/WordPress/gutenberg/issues/70060

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Ticket URL: <https://core.trac.wordpress.org/ticket/63396#comment:4>
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