Cannot load Mojave or Windows 10 after trying to install Windows on iMac

Hey,

recently I tried to install Windows 10 alongside Mojave on iMac using Boot Camp. I selected the memory that should use Windows, but after the restart my iMac loads Windows 10, but unsuccessfully with an infinite loop "windows needs to restart..." with the error code

"IO1_INITIALIZATION_FAILED".

Another part of the problem is that I seems to am not able to use apple magic keyboard, as the caps lock button does not light up. Also tried another one but failed.

Any ideas?