Stuck at "pci configuration begin"

I used this tutorial: https://youtu.be/j-Cm30I_DEw

My System Specs: GPU: AMD RX570 4GB CPU: Ryzen 5 3600 MB: Gigabyte Aorus B550I Pro Ax SSD: SanDisk 240GB

In the tutorial it was said that you should disable CSM in the Bios, but if I do that, I cannot select the USB Stick for Booting, I can only see the Windows Boot Manager as a boot option.

Could CSM be the problem and if so how can I boot from the USB with CSM disabled.