So, I was playing Minecraft the day before, having no issues at all. The next day when I tried to launch my MC world on 1.16.4 with no MODS, I have never even installed a MOD. I get this message 

"The game crashed whilst mouseclicked event handler.
Error: java.lang.IllegalStateException: failed to create a child event loop
Exit Code: -1" 

I have included my crash report below. If anyone can help me with this, it be greatly appreciated. 

I reinstalled windows, and I still get this issue, and the only security software I use is Microsoft security. 

I also wanted to add I have disabled Microsoft security to see if that would fix the issue and it did not.