@dremelts Yeah like Florian said, it takes a bit of time to get used to it because swiping behavior we get on Android/iOS is quite different. Also, if you have a phone case then it'll get a bit more tricky. You can change the sensitivity in UT Tweak Tool though. Edge size makes the sensing width on each edge so your swipe will be detected more.
@dremelts No idea either, but same here with a local Nextcloud snap installation with (snap-managed) self-signed certificate. Invalid host URL no matter what URL is given. Calendar synchronization works fine with other, non-UT clients.