It worked, thank god my cell phone works again.
I have loaded the following firmware Mi 11t pro (vili) Global MIUI 12.5 V12.5.4.0.RKDMIXM Fastboot ROM
and then performed the flash process again with "clean all". Everything is all right again
Then I was able to update to the 12.5.5.0.RKDMIXM out...