This sounds similar to a problem that is persistent with me, every time I try to publish the site I’m presented with a blank white box. I have to press cancel and then publish again which works every time second time round!
With Rapidweaver Classic I haven’t had any problems since years. Elements is by far not that stable.
Just when I write that I have to publish a larger project in compatibility mode and it just stoped with an error. This website was published some time ago without problems.