No, there isn't any limit. Did this suddenly start happening? Were you able to save before? Can you confirm which version of XD you're running?
Same for me. It started happening after I added new art boards. I'm on a mac.
- save as... >> doesn't work
- select all, copy, new document, paste, save >> doesn't work
I'm a little bit panicing because when this bug is solved, I'll have to update XD so I'll have to quit. I have created lots of new art boards since my last save so...
version: 0.6.12.17 beta
I exported all of my art boards to svg so I can remake them (worst case scenario)
Yes, I was able to save before, it just started happening. Last save was yesterday (20 art boards ago )