I installed "kurtjensen.passage", but if I click on "+ New Event" or check the details of the event, I get 500 error. How do I specifically deal with transferring authority from the Roles plugin? Where is the "id" old of the permissions in Roles described in the backend?

I am happy to try assist you but I would ask that you update to a current version first. 1.1.15 version was released Apr 01, 2016

Current version is 1.2.32

See: https://octobercms.com/plugin/kurtjensen-mycalendar#changelog