That error code is a crash in native code.
You probably have a file beginning hs_err_pid in your minecraft folder from the time of the crash?
If you do don't post the full file (it will have your user credentials in the dump), just post the first 30 lines with the error.
But from your description it sounds like a bug with your launcher.
I can see from the log, the launcher is actually adding code to the minecraft runtime:
-javaagent:D:\minecraft files\my modpacks\Install\sklauncher-fx.jar=1.18.2