License Key Not Working

I'm seeing this message everytime I go to register our Product License Key. Anyone else?

Do you connect to the internet through a proxy?

I'm sorry this fell off my radar. No, we do not connect through a proxy. The problem I noticed is that I had a working Key but upgraded my Office Programs and now the key does not work.

Is there anything else I can try?

Have you tried de-register your license and re-activate it on your new Excel version?
https://store.seotoolsforexcel.com/activations/

Can you email your email/key to victor@seotoolsforexcel.com and I'll look into it.