Hi, how are you going to see since my server is a mods and then I learned about the plugins, I started to investigate more, and I saved a mod that acted as a plugin, which was the ForgeEssensial, I started looking for how to use this mod and the Truth is really difficult, since there are only tutorials about the plugin, but I found one, and then it told me how to edit it, enter the mod folder and it doesn't let me edit anything, I get an error and I tried several configurations, I think That the error is 505, could you help me? Thank you.
Forgive my grammar, my native language is Spanish.