Game error 1_2 in Port MM

Hello everyone!

I have a question to you since i cant finish any game of Port MM which happen to be my fav map
It started I think a month ago that after a few rounds or lately in the last round I get the error 1_2 and im thrown out of the room and lose all I gained.
I dont have this problem when i play Port Hero Mode or any other MM games othr than Port, so I guess its some kind of map problem?

I really hope this is fixable cause I have so much fun plaiyng this map and so its really frustrating.

Greetings and thanks everyone