Will not save my project on RW 7.3.3

RapidWeaver Classic
1

When I go to save my project I get a dialog…

The document “xyz” could not be saved.
If this happens frequently, please try saving the document using “Save As…”
to a new location. If you’re still experiencing issues, contact Realmac Software support.

I had a days worth of work which I couldn’t save. I quit RW and now can’t save the project without the recent changes either.

I use foundation stack and a theme.

It would be helpful if it gave a clue as to why it failed.

2

Did you contact Realmac support?? If not, do that here:

When you contact them, they will need a lot more information.
What version of RapidWeaver do you have?
What version of the Stacks Plugin do you have?
What version of Foundation do you have?
They might also want you to send in your saved project file.