Hello,
After upgrading from d8 to D9.4.8 I get this in the watchdog:
Deprecated function : mb_strtolower(): Passing null to parameter #1 ($string) of type string is deprecated dans Drupal\redirect_404\EventSubscriber\Redirect404Subscriber->onKernelException() (/home/xx/www/xxx/sited9/web/modules/contrib/redirect/modules/redirect_404/src/EventSubscriber/Redirect404Subscriber.php ligne 108)
Redirect 404 (redirect_404) Enabled 8.x-1.8
Don't know if it's important but it's FYI at least.
Regards.
Active
1.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Still there on D9.5.3, PHP 8.1.
Redirect 404 (redirect_404) Enabled 8.x-1.8
Deprecated function : mb_strtolower(): Passing null to parameter #1 ($string) of type string is deprecated dans Drupal\redirect_404\EventSubscriber\Redirect404Subscriber->onKernelException() (/home/xxx/www/xx/sited9/web/modules/contrib/redirect/modules/redirect_404/src/EventSubscriber/Redirect404Subscriber.php ligne 108)