Cannot create sharing link in reminders or notes app

When trying to share a reminders list or notes with my girlfriend through iMessage it won’t load the link to send. It will just have the „buffering circle“ the whole time and won’t let me send the message. When trying to send it through a different app I get the error „Couldn’t add people“.

Both of our reminders and notes apps are linked to our Apple ID, there are no restrictions on the lists and we have the latest iOS installed.

Someone know a solution for this?