Storyline 3 Error: Available Memory is Low

Just to add to Phil's reply, I would say it's more likely to be your project size that is causing the issue as I had this with a particularly large project. I resorted to amending the file name every time I saved it just to get it to save and not corrupt the file.

I do regularly delete the cache on my laptop to release space on my laptop (I save my projects to a network folder), but this didn't resolve the issue with the large project file that wouldn't save.