Hi,
Codecanyon might need a few hours to clear the API cache to show the details correctly. If you can open a support ticket here, that means your purchase is valid for sure.
Can you please add temporary FTP and back-end details so I can check your configuration, and debug the code if neccessary? We have no similar reports of such problem, so I am guessing that it is either a newly discovered bug, or something specific with your configuration.