When I try to remove votes from polls, it gives an error.

An error has occurred.
0 Argument 1 passed to Joomla\CMS\Application\WebApplication::getEventClassByEventName() must be of the type string, null given, called in /public_html/libraries/src/Application/EventAware.php on line 105

I have the latest versions of polls, joomla and use bootstrap 5 layout.

Any ideas on how to solve this?