[2021] Crash, Pls Help Me

Everyone is correct that you're running out of memory and that a fixed size pagefile will help. I recommend setting it to 32 GB (that's 32000 MB since pagefiles are measured in MB).

And just for reference, if you do end up needing more help, the best place to get that is our official support forums found here: https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/