I had downloaded 1.16.3 Forge and had WorldEdit and Optifine installed and everything was working perfectly but in the last couple days, I've started getting Exit Code: 0 when launching. I tried removing all the mods I had installed, updating Forge and the other mods, and even uninstalling and reinstalling MC with no luck. When I launch the Optifine profile, it works, but it's when I try forge that it crashes. I also tried launching in compatibility mode using the legacy launcher. I've attached the debug text if that helps. Thanks!
[16Jan2021 22:34:51.295] [main/INFO] [cpw.mods.mod