[Solved] Corona render issue with older scenes from Max 2019

I just wanted to open an older scene which was saved with Max 2019 and Corona 5 and it doesn’t render anything.
It just stops after trying to parse the scene. It doesn’t crash but the render window just closes. When i activate IR i get a Max crash.

I have installed Corona 5 again and the same happens. So is this Max 2021 related?

Thank you!

Copying the whole scene in a new fresh one solved the issue. So it was compatibility issue within max itself.