https://media.discordapp.net/attachments/371405518482440194/402904304903520296/unknown.png?width=491&height=581

This will be down to a plugin sending malformed json. Could you test without any other plugins?

It works in 1.7 but not in 1.8 I'll test.

I have the same join problem, also without plugins i cant join, i need to reconnect a few time's before i can join.

Hm, I can't reproduce it. Can anyone provide their world for testing?

My server has a texture pack maybe that's the problem ?

I have the same error too. But i can't delete any plugin. I removed temporaney the ViaBackwards plugin i the bungee and since this mornig i could join the hub with 1.8-1.12.2 versions but in the others servers i couldn't join. Today i can't join with more versions except the jar version. I can provide my world of the hub and its plugins (not setted).

Idem for the bungee