first of all: try deleting your cache by deleting everything in %LocalAppdata%/Just Cause 3 Multiplayer. Then start yet again the mod as administrator.
If that doesn't help reinstall the mod. If that doesn't help again, I'm going to forward that case directly to Alex aka. meow, the main dev of nanos.
Just as the title says, when I connect to a server the game either downloads a few files, then jumps to the main menu; or when joining just stalls, then returns to the main menu again.
I've attached a gif to make it easier to actually see what I'm talking about, and if you were to check it you'd see I've also attempted to join multiple servers, both vanilla and without dlc.
I own the full copy on steam, mod is installed fine. I've tried running it as admin \ in compatibility mode, and I've disabled both my antivirus and firewall on both my router and machine, so those don't seem to be the issue. If there are any logs that are relevant I could upload those as well.
Thanks in advance for any help provided, I do appreciate any feedback.
gif: https://my.mixtape.moe/mpmxzw.gif (link because the gif is 50mb lol)