Make WordPress Core

Opened 3 years ago

Closed 6 months ago

#53352 closed defect (bug) (worksforme)

Twenty Twenty-One: PHP warning: Illegal string offset 'custom_css_post_id'

Reported by: karenaug's profile karenaug Owned by:
Milestone: Priority: normal
Severity: normal Version: 5.7.2
Component: Bundled Theme Keywords:
Focuses: template Cc:

Description (last modified by sabernhardt)


When I open my blog, I get the following error message:

Warning: Illegal string offset 'custom_css_post_id' in /.../wp-includes/theme.php on line 1063

In the dashboard I see the following message: offset 'nav_menu_locations' in /.../wp-includes/theme.php on line 1063

Warning: Cannot modify header information - headers already sent by (output started at /.../wp-includes/theme.php:1063) in /.../wp-includes/functions.php on line 6362

Line 1063 is $mods[ $name ] = apply_filters( "pre_set_theme_mod_{$name}", $value, $old_value );

I have tried: uploading wordpress again with ftp, clearing caches, reinstalling the twenty twenty one theme, deactivated plugins, uploading the theme.php file again.
I don't see this bug when I activate other themes.

The forum thread is:

Is there anything else I can do?

Kind regards,


Change History (4)

#1 @audrasjb
3 years ago

  • Summary changed from Bug in theme Twenty One to PHP Warning in Twenty Twenty-One

#2 @SergeyBiryukov
3 years ago

  • Summary changed from PHP Warning in Twenty Twenty-One to Twenty Twenty-One: PHP warning: Illegal string offset 'custom_css_post_id'

#3 @sabernhardt
3 years ago

  • Description modified (diff)

@karenaug Hi and welcome to Trac!

Your site still uses Twenty Twenty-One, and the custom CSS is included properly now. Were you able to fix it somehow?

I received similar errors with Twenty Twenty (and possibly Twenty Nineteen as well) around the time you opened the support topic and this ticket. I think the errors occurred immediately after activating a plugin, though you said that was not the case when you had trouble. (Because my site was a local development site, on WP5.8-alpha, I replaced it entirely.)

#4 @sabernhardt
6 months ago

  • Milestone Awaiting Review deleted
  • Resolution set to worksforme
  • Status changed from new to closed

I should have requested reporter feedback with the keyword, but I think this was not caused by the theme.

If you still experience this, please reopen the ticket.

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