Help! Black screen boot OCLP Ventuta iMac late 2013

So I got into the process of installing OCLP on my iMac 27 late 2013 by following this guide: https://jensd.be/1897/apple/install-macos-ventura-on-unsupported-models

Everything went fine until the installation of macOS Ventura. After a while there was a reboot and from there it goes black screen. I rebooted again, holding alt/option key, booting EFI and then the drive Ventura is installed on, but the black screen are coming back.

I never get to the step to choose language and so on.

What to do now?

Many thanks in advance for help!

submitted by /u/meloonamusic
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