I have a regular token of Xenforo's license but, for strange reason, it appear not valid.
I controlled my license data, and inserted it here, but doesn't work and so i can't buy the mod "Social groups".
May someone help me?
All forum tokens for a customer at XenForo are associated with the same customer information supplied by XenForo. And the customer token for the forum token you supplied does not match what is recorded on your account here.
Do you own the XenForo license, or does someone else own it?
Something is not fitting here. If you just purchased it recently, the forum license would be transferrable and the license token you're entering is not transferrable. That means you're either using someone else's license token, or you purchased a used/untransferrable license.
Contact XenForo and ask them why your customer token does not match your original one from socialvb.com. They should be able to correct the problem. And then you'll be able to validate here.