TWRP is installed. And booted in it. Now?
1. BAckup everything via TWRP.
2. Download your rom, copy to device and install via TWRP? Should I WIPE something first?
Is this the last version xiaomi.eu_multi_HMNote10Pro_V12.0.14.0.RKFMIXM_v12-11.zip
edit:twrp backup ended with ""failed