Describe the bug

Im playing a custom modpack.
When playing on my server I am not able to use the memory card to link any type of p2p tunnels, but when I tried it on singleplayer it worked just fine.

How to reproduce the bug

Try to use p2p tunnels on a server.

Expected behavior

The linkage of the p2ps

Additional details

No response

Which minecraft version are you using?

1.16 - MOSTLY UNSUPPORTED

On which mod loaders does it happen?

Forge

Crash log

https://pastebin.com/tswQ4h19

Try removing the item you have in your offhand and using the memory card

Now I just seem dumb... That worked, thank you! I don't think it should require an empty off-hand when doing it though, if that is possible.

It shouldn't, but plenty of server mods (even Sponge) somehow break it