I don't know why I am getting this all of a sudden. Yesterday I was playing the game just fine,
then today I get this.

Playing on Minecraft v1.21.1 , NEOForge v21.1.93, ExtendedAE v2.0.1
On Modrinth app platform.

and

and this is when I hover over the error text.

you need to update ExtendedAE to v2.1.0+