Envato key

Hi, the following message is under Enfold Themes Update:

The last time we checked your key, we couldn’t connect to Envato:

Purchases could not be accessed
Username could not be accessed (only required for your information)
The email could not be accessed (only required for your information)

The following errors occurred:

Purchases: Your private key is invalid.
Username Your private key is invalid.
email Your private key is invalid.
Purchases: Your purchases cannot be accessed. We cannot check for updates.

Do you have a solution for this?

Best

John