You need to update your version number to a higher value. If you change only the build number it won't work. I had the same issue after my app binary had been rejected.
Example:
App 1.0.0 (1) -> rejected for some reason.
App 1.0.0 (2) -> you'll get the "There was an error importing this build"
App 1.0.0 (3) -> same error..
App 1.0.1 (1) -> will work!
Cheers,
