a fatal error has occurred this connection is terminated

[nikatark]

i have an aternos server which when i try to join kicks me out saying "a fatal error has occurred this connection is terminated" but when i try joining with a different account on the same computer it works fine .

[nikatark]

log form server : https://pastebin.com/As8YF19m

log from client: https://pastebin.com/fGhFHHxk

[nikatark]

thank you very much , i did acquire a lot of morphs from forestry butterflies but how can i fix this problem / delete my morphs? 

[nikatark]

could not find a way to edit playerdata since it is on athernos and they forbid you of editing/uploading files , deleted morph mod from server and client and it works , although it is a bit sad that i no longer have morph mod