Greetings,

a player on my ATM5 Server did crash repeatedly when trying to log in and the console would show the following error:

https://pastebin.com/JTXC98hK

According to my player the crash occured after jumping into the home portal in the End Dimension.

I fixed it by using NBTExplorer and editing the player.dat. In there I looked for the dispenser in the inventory and changed the "isActive" tag to 0.

After uploading the edited file, the login did work again.

Regards,
Softwerker

I have the same problem on a ATM4 server with the everlasting gobstopper... When a player jumped through the end portal he crashed with internal server error and afterwards could not join and got the same error...