Paint_Ninja

You need to update your graphics drivers. Instructions on how to do this are in the FAQ here: https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq#:~:text=Forge immediately crashes on launch without any mods installed%2C how do I fix it%3F

Please read the FAQ first and try again. Rule 3 - please include links to your debug.log and crash report on pastebin.com/paste.ee rather than dumping it in the post directly. https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq

Please read the FAQ first and try again. Rule 3 - please include links to your debug.log and crash report on pastebin.com/paste.ee rather than dumping it in the post directly. https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq

You need to update to Forge for MC 1.16.5 instead of 1.16.4. As far as I'm aware, all mods available for 1.16.4 have already updated to 1.16.5. In future, please read the rules and FAQ first. https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq

Please read the FAQ first and try again. Rule 3 - please include links to your debug.log and crash report on pastebin.com/paste.ee rather than dumping it in the post directly. https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq

The version you are using is no longer supported on this forum. Please update to a modern version of Minecraft to receive support.

Please read the FAQ first and try again. Rule 3 - please include links to your log on pastebin.com/paste.ee rather than dumping it in the post directly. https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq

Please read the FAQ first and try again. Rule 3 - please include links to your debug.log and crash report rather than dumping it in the post directly. https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq

Try this part of the FAQ and let us know if it worked: https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/#:~:text=Forge immediately crashes on launch without any mods installed%2C how do I fix it%3F

Unfortunately the issue seems to be caused by a Mixin, so pinpointing the problematic mod will be tedious. Mixin means that the mod modifies the game directly rather than using a Forge API, which means we can't tell which mod modified the game to cause the issue - only know a list of mods using Mixin that might be causing it. In your case this line in your crash report tells you a list of mod IDs using Mixin. Backup your server, delete one of those mods and see if it works. If it does, that mod is the problem. If it doesn't, put it back and delete the next one in the list instead. Repeat the process until you find the broken mod.

Please don't revive old threads. Read the rules and FAQ

Update your graphics drivers. You want the ones labelled "WHQL Recommended"

Please read the FAQ first and try again if the solution in there doesn't work. Rule 3 - please include links to your debug.log and crash report rather than dumping it in the post directly.

Looks like a broken mod that's modifying the game directly rather than using a Forge API. Backup the server then try removing compat116plus and/or pehkui (both of these mods directly modify the same thing so it's hard to tell which is the problem or if they're conflicting)

First backup your world just in case. Then try removing Optifine, it's known to break things sometimes.

Unfortunately bungeecord doesn't support proxying Forge. However, you can get it to work by using this instead: https://www.curseforge.com/minecraft/mc-mods/server-redirect

Yes. Try deleting all the biomes you'll go config files.

One of the config files for Biomes You'll Go is broken or invalid. Try deleting it

Please read the FAQ first and try again. Rule 3 - please include links to your debug.log and crash report rather than dumping it in the post directly.

Please read the FAQ first and try again. Rule 3 - please include links to your debug.log and crash report rather than dumping it in the post directly.

Please read the FAQ first and try again. Rule 3 - please include links to your debug.log and crash report rather than dumping it in the post directly.

Please read the FAQ first and try again. Rule 3 - please include links to your debug.log and crash report rather than dumping it in the post directly.

Please read the FAQ first and try again. Rule 3 - please include links to your debug.log and crash report rather than dumping it in the post directly.

Please read the FAQ first and try again. Rule 3 - please include links to your debug.log and crash report rather than dumping it in the post directly.

Unfortunately you'll need to do a binary search because some of your mods are directly modifying the game rather than using the Forge API, which makes it hard to tell which mod broke. The binary search is a way of finding a faulty thing among a lot of other things, without having to remove the things one-by-one. This is useful for finding a broken mod among hundreds of mods, without having to spend time testing the mods one-by-one. The procedure is simple: Remove half of the existing things, and put them aside. Run the program / game. Does the issue still exist? If YES: Repeat from step 1 with the current things. IF NO: Swap out the current things with the ones set aside, and repeat from step 1. Repeat this process until the problematic thing/s have been found.