I am using a mod pack I put together myself on CurseForge. It works perfectly on it's own. Then I throw Optifine in its' mod folder and it crashes with this message:
[ The game crashed whilst initializing game Error: java.lang.NullPointerException: Initializing game Exit Code: -1 ]
I have tried pretty much everything; reinstalling Minecraft, updating Java (even though it didn't need to be updated), using multiple different versions of Forge, using the other Optifine versions for 1.16.5 - I don't really know what else to do. I'll insert a Pastebin of the Crash Report, and of the Latest Log. I don't know which one is useful, so I'll put both.
Crash Report
Latest Log