I don't know, I just joined a game using my two copies of TTS to double check, and both could see all the interface stuff. Can all players see the setup menu? if you promote someone does that fix the problem? Is you Ping really high? I'm grasping at straws, as the interface code should be run by all machines and just updated from the host. Add me as a friend and we can try hosting each other.

The setup menu is also only visible to the host. If I transfer the host, only the other player sees it. Promotion didn't do anything. Ping is very low (same local network).

Hi Tuff-Luck, sorry for resurrecting the thread but have you guys found a solution for the above?
I have the same issue.

When I host a multiplayer game, all the joining players are missing the interface elements. When I join a hosted game, only I'm the one who can't see them.

I also get an error message: "www errror, malformed URL at []"
All the players are promoted and ping is below 30 for the whole group.

I was worried my new fonts may be causing an issue, but I just loaded a test game and it was working as expected. Both computer could see and interact with the UI just fine.

So while I'm confident the problem is not in my mod, it does leave me scratching my head as to what may be the issue at your end.
Have you tried the old classic "turning it off and on again"?
There is mod caching which can be turned off to re download all the assets, maybe something is corrupted in your cache?
Then there all sorts of router things you can look into (ports, firewall, etc), but that is beyond my ability to help.

Sorry, not much help I'm afraid.

Yeah, I'm sure that the issue is not with the mod itself rather something with my setup.
I've just tried it on my second PC (it's behind the same router) and the mod works perfectly on that one...

I'll keep trying to solve this little mystery, but at least I have a workaround, if I want to play with friends.

Anyway, thanks for your answer. Pretty awesome mod you've created.

Just FYI, yesterday I played it with a friend and when my friend joined the server he said he wasn't seeing the UI. But then he just logged out and back in the server again and he could see it just fine. So it seems is not very consistent, but there is something weird happening.