"a fatal error has occurred this connection is terminated"

Hello Aternos team
My problem is that on my server with mods I receive the message when I enter: a fatal error ..., the mods work if I enter my own world but if it is on the server I receive that message, I am new and I don't know how to send the log Help me, thanks.

Version is 1.12.2 (14.23.5.2854)

If I play minecraft cracked with a friend, this is my server log

https://mclo.gs/qpQqA1N