Steps to reproduce:
1. create an event
2. review open comment
Workaround (if any):
Typo is 'beeni"
The typo is a configuration error of your site's setup: The community version does not come with the comment reason (see https://bitbucket.org/opencast-community/matterhorn/src/b01ccaf70cdacadcad2577623c7f4548a1429437/etc/listproviders/event.comment.reasons.properties?at=r%2F2.3.x&fileviewer=file-view-default).
You seem to have an adapted /etc/listproviders/event.comment.reason.properties that contains the type.
This bug is the result of a local configuration issue. The community version is not affected. I therefore close this issue.
Oh, ... sorry, haven't selected the fast-ng workflow... it's indeed a typo, I'll fix it.