Error during Edge Publish. Demo version

Hi,

Edge animate gives me the following error message when publishing for the web:

Edge Animate encountered error(s) publishing:
Failed to publish to web at path /Users/macuser/Google Drive/Current Projects/Mustt Audio/EdgeAnimate/publish/web//Mustt.htm.  Make sure the folder is accessible and that the file is not locked.

I'd like to buy Edge Animate but won't part with any money until I'm certain it works properly.