1.3.7 Allow Overwrite Not Received
This is an uncommon error that may occur when you are attempting to upload a file. It occurs because the parameter indicating whether the file you are uploading should allow overwrites is not received. Unfortunately, this is a fatal error, and it means that you will be unable to upload your file at this time.
The webmaster is always notified of this type of error and will work on resolving this problem.