Hello I am having trouble with the server its not me but my friends the server has only 3 max players when i join it ok but when my friends join we all have fun for about 5-10 but then suddenly one of my friends says he cant move and his minecraft crashes i am using the Attack Of The B-Team modpack and sometimes both of them crash but not at the same time.
So please i need some help because they will start to hate the server and we cant play again.
The log:board.aternos.org/wcf/attachment/49/
AS you can see they just keep leaving and joining(Obada88-mohmmad101)
but i never crashed my name is mohamad1122
Thanks for the answers 
And sorry if there is already a thread like this because i searched everywhere and i couldn't find any answers