Can't establish contact

Hello, I have managed to make the desktop client function just fine but as soon as I try to use the mobile client it just seems to not want to do anything.

I use LineageOS (android) with Jami installed from F-Droid.

Specific problem is that if I try to send a message to a friend. He can not see my messages or any prompt to add me as a contact (same thing on my side). My friend in this case uses bog standard android with app installed from play store.