I’m getting the error
net.fortuna.ical4j.model.property.XProperty cannot be cast to net.fortuna.ical4j.model.property.Uid
on 1.8.3 from this public URL: https://www.yi-zentrum.at/veranstaltungen/list/?ical=1&tribe_display=list
I tried to downgrade via F-Droid, but it didn’t work. I don’t recall if this error started happening after a recent update.