We are sorry to hear about your troubles with publishing. The reported behavior is inherent with a known issue described here
Basically, if your Apple ID or password contain characters that do not fall into the a-z, A-Z, or 0-9 groups of characters, you will experience the reported issue. Let us know if correcting your credentials to match these requirements fixes the issue.
In addition, you need to be aware that sometimes the Publish operation might fail with a "Cannot upload application" non-specific error message. This is usually a time out on our side but your binary upload goes through. Should you get this error, please check your binary status in iTunes Connect. If the upload completed (although an error was shown), the binary state should be: Upload Received / Waiting For Review / Ready for Sale or Rejected.
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