I really appreciate you help. I had a Cyanogenmod version on my Aquaris M5 and everything was running smooth. Update was available, Update was downloaded and installed....bähm bootloop.
I have no fastboot access, but adb is possible and I end up in TWRP everytime.
Stuff I tried:
Installing the working custom Rom does not help.
Installing the original Rom does not work; Error: Could not find "meta-inf"/com/google/andrid/upadte-binary in the zip file
Something I noticed. When I switch it off and switch it on again, it stops a the logo.
Any idea how to unbrick my phone? Than you very much guys