White screen on MacOS 10.15.7

Hello, after I finally managed to install MacOS Catalina 10.15.7 only a white screen opens and the mouse pointer is displayed in the upper left corner.

I'm using Opencore on a B450M Pro4 motherboard with an AMD RX590 and a Ryzen 5 2600. I uploaded the folders from the boot stick to Google Drive. I would appreciate any help!

https://drive.google.com/drive/folders/1UBawulZQQHH6hUqDduYTiTXqP39FkxbJ?usp=sharing

Thanks a lot!

Daniel

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