Hi, can you explain a bit more on what you mean by you can't spend SP? Are you playing on v0.25, and on browser or desktop?
You should be able to return back to the normal game and spend it. If you're facing further issues, can you send your savefile to me? (For example if somehow the savefile got corrupted , I can fix it for you)
To further elaborate, Dreamsand wasn't meant to be released yet - it was I think accidentally leaked in v0.23 and I had to quickly put out an update to temporarily disable it to prevent issues. Sorry for the trouble~