i use forge-1.10.2-22.214.171.1241-universal and spongeforge-1.10.2-2011-5.0.0-BETA-1560, are compatible.
do the plugin need any open port? because i have a firewall that only allow users to connect the server with 25565,
im testing it without other mods to see what happens
this is the config:
http://pastie.org/10906133 the messages are in spanish, feel free to use them
Edit: works fine without other mods installed, i will detetc which is causing the error
Edit2: ModControl was the problem, without that mod it works.
I noticed that i cannot withelist players in ofline mode so new players cant join when the mojang servers are offline, can you add a withelist in your plugin? or change te default withelist to accept withelisting players in offline mode, thanks! Or you can add an option to register an user from console or by an op and a command to disable new registrations from normal users so i can register a user, give him his password and then he can change it