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Description
Currently, if there's a critical error the user is presented with a blank page. Even though this is the admin ui which we excpect is mostly used by admins, who know how to handle this situation, I think it would still be preferable if we were able to display a proper error page instead.
I would also like to see error boundaries for certain component, e.g. modals. Just because there was an error during event creation does not mean the whole ui needs to give up and crash.