@Ingo Thanks a lot, I managed to get it into recovery and then install an update with the installer software to resolve the issue!

Hi, I did a stupid thing. I may have deleted UBTouch / corrupted it by trying to re-run the installer on a non-dev installation and/or removed the OS data via the UB touch recovery mode. It is now stuck on the loading screen. adb or the ub-ports installer doesn't find it. Trying to boot into recovery doesn't work. What can I do? Thanks in advance,