ASPOSE Word error - CryptographicExection Access denied

One of our customers is getting following error attached. Everything has been working fine for a long time and all of a sudden ASPWord is not working. Can you tell me what this error means? Is there something wrong with the license file. We both have valid license for your product.

Thanks,

Divyesh

Please try the solution provided in the following Wiki article:
https://purchase.aspose.com/policies#licensing-faq

Best regards,