Alternatively, manually delete the cache folder:
Make sure your computer’s regional settings match the region for which your product key was purchased. In Windows, go to . If the settings differ from your key’s intended region, change them and try the activation again.
Follow these troubleshooting steps in order to resolve the error. 1. Verify Internet Connectivity and Time Settings
Causes
Security certificates must strictly match the region details saved inside your account profile. A mismatch will immediately flag the license link as invalid: