I too am running into this issue. However I am trying to build the offline installer. When use the release build for my program the libraries are small enough that they do not trigger this issue. Using the Debug build causes the binarycreator to throw a fit. In my case it really does not like Qt5Cored.dll. When that dll is present it triggers the following:

[2757] Warning: QFile::remove: Empty or null file name Caught exception: Cannot create archive "C:\Users\XXXX\AppData\Local\Temp\binarycreator-l9Mfi9\com.XXXX.xxxxx\2.0.0content.7z": not enough memory

I'm not sure if this helps matters at all but if you find out anything from the developer mailing list please drop a comment here.

BTW, I am using the 3.0.4 release for windows.