I get error when trying to reset my license

I tried both online and offiline activations and I got the following error messages, respectively:

"Activation failed: Error - cannot receive data - Support Reference: Cannot ReceiveData - 79)"

 Offline:

"Unhandled exception occured in your application

"Activation failed because the certificate is damaged. COntact oos-sdl.com  and et the certifcate again. Support reference: Returned data error 98"

Can you please provide guidance on what I can to in order to be able to activate the license?

Thanks,

Candelaria