Every time i try to load up in a single player world, mod crashes my game. When I get into the server with the mod included, extreme low FPS. I tested out using multiple mods and removed Hexerei to determine whether or not it was my pc and i was able to run alot of mods with higher file sizes and I had no problems with singleplayer crashing and my multiplayer server having low FPS. When I use Hexerei along with the current mods I am using, singleplayer would crash and I would have low FPS in my multiplayer server.

You can find game logs here: %AppData%/Roaming/.minecraft/logs

Could you attach log or crash report, please?

And for multiplayer there was also no other logs referring to a drop of FPS on the server

There wasnt a specific log that was directly linked to the crash, as I am loading into another world in singleplayer, I got stuck in the loading screen until it crashed and I only got this error message

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