What version of the mod are you trying to run, more specifically what JAR file? The old patreon releases won't work since those have DRM, I uploaded the DRM free versions of those ones into the gofile folder in one of my earlier posts. Though the DRM only just freezes the game from loading & shouldn't prevent it from loading.
If it's the 1.9.0 version, then I don't really know what could be wrong. Are you using other mods at the same time? That error message doesn't really tell much other than forge failed to load the mod, there should be more information about what exactly happened before that message. If not in the error box, then in the log file.
I also don't think Mojang can't just prevent a mod from running just like that.