It's empty for me too. Maybe it has something to do with with frontier's big forum change. Perhaps they change things in game mechanics too wich causes this problem. Even though the workshop seems empty i can still find my saved and subscribed objects under this specific category on steam.

Literally just thinking the same thing when i came across your post.

Mine has been playing up for a while today :( was working around 2 hours ago

Same empty workshop "Drink I need Drink"

yeah, it's just kinda gone XD don't know if the the custom scenery still works in game yet. planet coasters been weird to me, went on an old park and all the log flume cars were sideways and on my current one peeps got stuck all over the place.

back to the old and normal state for me.

Most of the time if it appears empty it's normally an issue at Steam's end (usually one of their servers going down or something).