I don't think this is the modpacks fault since it works perfectly fine of single player. Also, sorry if I shouldn't post about the server and stuff here. I tried to get help from other places again and haven't gotten any replies that help too.

Make sure you've updated the pack via the Technic launcher.

Just found it was becuase i was in the tainted (purple) biome.

I am using the latest version, ill try reinstalling it.

that didnt work either.

Were you able to log on?