This server has mods that require FML/Forge to be installed on the client error: If this error appears, it often means that you are attempting to join the server from a vanilla version. You can confirm this by checking if theModstab from the main menu appears. If not, return to your ...
This is only for FG_1.2(for minecraft 1.7.10). Minecraft mod development framework used by Forge and FML for the gradle build system - anatawa12/ForgeGradle-1.2