Import Fail

Who has encountered the below error and how were you able to deal with it.

Import Failed!
Name: aBy8Qr4HAiBrwm2nkYdjgQ (1).xlsx
KobocatDeploymentException: Expecting value: line 1 column 1 (char 0)

@lookman, before uploading your XLSForm to the community could you validate it through this online validator to see if there are any syntax issues that are hindering the same?