So, I made a mudpack with "Curse", and it's been all nice, fine and dandy, until a problem occurred. Me and my friend wanted a server, and we downloaded the Forge server. We played and then we realized around an hour in. There were no modded blocks. NOthing worked that was modded, whole forests weren't working because of that.
I put my mods folder, unpacked it into the server's mods, via forge, and still did not work, I can't place any modded blocks down, it just takes it away immediately. Nobody else can see modded blocks. Oh yeah, and I did the configs, too. Here's the error: