I have TWRP 3.2.1-1, and had Lineage-15.1-0305 nightly and Magisk 16.0 installed. I did a backup of all partitions, then installed the latest Lineage-15.1-0326.
It wasn't working out well for me, so I decided to roll back, and did a restore of all the partitions; but now my phone won't boot.
When I choose 'reboot' after the restore, TWRP asks "Install TWRP App?" and loops there if I choose 'Swipe to install'. If I choose 'Do not install', it just sits at the mi5 logo and doesn't progress (does not ask me for decryption password).
What am I doing wrong, and what should I do next?
(It's been this way for some time now, restores not working - but in the past, I was prepared to do a factory reset/full wipe, so I didn't think much about it...)