not gonna write a long message, basically i have a modded server with most of the mods from better mc with some extras and some i got rid of, and i keep getting errors on the server when i try to join it, heres the most recent one (and also one ive gotten multiple times and is now the main problem):
Internal Exception: java.lang.IndexOutOfBoundsException: readerIndex(836) + length(1) exceeds writerIndex(836): PooledUnsafeDirectByteBuf(ridx: 836, widx: 836, cap: 836)
Heres the screenshot: