Compile with Rider okay but Engine crashes when running

Dear experts,

I am using Rider 2021.1 and UE4 4.26. I can build my solution like the first screenshot shows:


But when I try running it I get this error on Windows:


Does anyone have an idea what that could be? I have Rider installed on “C:\Program Files…” and the Engine is on "“E:\Epic Games\UE_4.26\Engine…”
A few days ago I had a compile error and I made the swap file on E: bigger, raised it to 4096MB. The compile error is gone but now the Engine crashes.

Thank you, Peter