We've had an issue recently where we couldn't connect to a LAN world. Have tried almost everything from updating to the newest client, trying the same one it worked on etc. Every time it gives us this error code: "minecraft internal exception java.lang.arrayindexoutofboundsexception index 0 out of bounds for length 0"

This is always after the player has joined and the world is loading, can't find the root of the issue for the life of me but from what i've seen not a very uncommon issue. Thanks in advance

Haven't you solved the problem yet? my friend and I have the same problem

Bump, same issue. Index out of bounds when on a server

Bump same issue

Hey everyone. Found the issue, with ATM9 the logprot mod seems to be causing the issue. I solved it by having everyone who wants to be on the server or LAN world uninstall the logprot mod (via curseforge or whatever you are using, may have to go into the mod files) and relaunching. Worked a charm.