No Mobile Network on Sony Z5 / sumire after encryption

Hey, my z5/sumire is not able to connect to the mobile network. I tried with 2 different sim cards from 2 different operators. Manually searching is possible and shows operators. But I'm not able to connect.. What should I do? This makes the phone unuseable.

Tried it on: e-0.7-n-2019091323560-dev-sumire

Cheers