Symfony > 4.4 uses getThrowable

Changing to Major, as the current RC version ( 3.0.0-rc1 → ) just doesn't function - IP addresses aren't banned and legit 403 and 404s produce fatal errors as well.

Thanks, I can confirm this issue!

Merged, thank you @siliconmeadow! :)

We should now proceed with fixing ✨ Make perimeter compatible with fast404 module and use DI for ban.ip_manager Fixed

Still seems to be incorrect!
Now I get

TypeError: Drupal\perimeter\EventSubscriber\PerimeterSubscriber::handleBannedUrls(): Argument #1 ($event) must be of type Drupal\perimeter\EventSubscriber\Event, Symfony\Component\HttpKernel\Event\ExceptionEvent given in Drupal\perimeter\EventSubscriber\PerimeterSubscriber->handleBannedUrls() (line 41 of modules/contrib/perimeter/src/EventSubscriber/PerimeterSubscriber.php).

-use Symfony\Contracts\EventDispatcher\Event;
was wrong. Re-adding.

Automatically closed - issue fixed for 2 weeks with no activity.