E_DEPRECATED: strip_tags(): Passing null to parameter #1 ($string) of type string is deprecated

[kkmuffme]

• I've read and understood the contribution guidelines.
• I've searched for any related issues and avoided creating a duplicate issue.

Please give us a description of what happened

To Reproduce

Step-by-step reproduction instructions

/wp-admin/admin.php?page=wpseo_page_settings
when saving get to page /wp-admin/admin.php?page=wpseo_page_settings_saved&settings-updated=true

Expected results

no error

Actual results

E_DEPRECATED: strip_tags(): Passing null to parameter #1 ($string) of type string is deprecated
in \wp-admin\admin-header.php on line 36

It seems you didn't set a title for the page when registering it

Screenshots, screen recording, code snippet

If possible, please provide a screenshot, a screen recording or a code snippet which demonstrates the bug.

Technical info

Used versions

• PHP version: 8.3
• WordPress version: 6.6
• Yoast SEO version: 24.3

[josevarghese]

PR available here: #22056

[dilipbheda]

Steps to Reproduce

1. Change the PHP version to PHP 8.2.*
2. Enable the WordPress debug log (Reference: Debugging in WordPress)
3. Navigate to the WordPress admin panel: {siteurl}/wp-admin/admin.php?page=wpseo_page_settings_saved
4. The error should be visible on the page.