This error message is displayed on Android devices if the URL to the license file is not correct. This could happen on own server systems that have not been properly configured. You will need to ask the Publisher to resolve this.
To test that the Viewer software, licenses and documents are working correctly on Android, use the following files:
Document – http://www.locklizard.com/Safeguard_demo/download_pdc.php?file=Secured_PDF.pdc
If the license registers fine and the document opens fine, then the problem is with the license file the publisher has given you.