CONNECTING ERROR FIX(Should Work)
If you're having trouble connecting to this map, or a friend is, try this below.

1. Your game permissions should be set to Public Match for default. If it is, then change it too Private Match and this should fix the problem.
2. If that is still not working, make sure your friend downloads the same map from workshop, then try reconnecting with the permissions still on Private Match.

If you're having any other issues, let me know and I will try to help you if I get the chance.

Thanks for reading this.