Problems Mi11 Ultra after fastboot Miui 13.0.5, apps do not start


Nov 30, 2021
I updated my Mi11 Ultra from Miui 12.5.20 to 13.0.5 by installing xiaomi.eu_multi_MI11Pro_MI11Ultra_V13.0.5.0.SKACNXM_v13-12-fastboot on my via fastboot. But something went wrong, because I cannot start the installed apps. A message says, that I have to wait until your device has completely rebooted before opening apps. But I have waited the whole night and restarted my mobile. It's still the same status. What can I do to either completely reboot or to go back to Miui 12.5.20?