Activation failed

"Activation failed. Could not connect to the activation server. Check the activation server address in the provider settings. -The remote server returned an error: (403) Forbidden.

I tried to activate my product with my activation code, but the following message appeared:

"Activation failed. Could not connect to the activation server. Check the activation server address in the provider settings. -The remote server returned an error: (403) Forbidden.

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