@fischer.poco said:
@turtle_racer
Thanks for the help and comment.
Now, if I understand correctly, I should reinstall OS Oxygene... and then reinstall the entire UT?
You're welcome @fischer.poco ! No worries man. We all had to learn this initially (myself included), so you are doing great. You are past the hardest part in my opinion which is having a phone with unlocked bootloader! So, congrats on that! OnePlus has really clamped down and seems to not give out unlock tokens.
Yes, you are understanding correctly. Re-install correct OxygenOS version and reinstall entire Ubuntu Touch. I think you should be good from there, but if not, just post in the forum and there are many kind people here to try to help out, such as @rocket2nfinity and @rondarius and others.
Good luck!