Both 20/24 don't work on my PC, no apparent reason

That exception code is very hard to track down the cause.
There is a post here on how to go about trying to find it:
https://forums.flightsimulator.com/t/how-to-troubleshoot-faulting-module-ucrtbase-dll-and-or-exception-code-0xc0000005-crashes/591670/1

There are also troubleshooting checklists in the support tab at the top of each forum page.