Maps don't work when playing P2P

Game works fine in local mode. I have many maps. They work fine when I start an offline game.

I configured my server settings to run P2P. I am able to launch the game and join my room. With two separate instances of VASSAL as two different players even. But in either case, none of the maps work. When I click a map button, I get a blank window.

This is all running on the same computer. i.e. offline and online tests are on the same machine, as is the P2P server.

Usually a blank map comes from having multiple maps all the same name in the configuration. So they are all called map and the program does not know what to do with them. I think older versions of the program didn’t react that way but newer ones do so check anything you are using as a map and change all the names in the fields from Map!