Failed to register - license

Good morning,

i have a user, when he tries to activate his license it gives an error message.
I already tried to reinstall but same error. he got version 8.0.9

Thanks

That registration error typically is a result of network/router security which blocks the requests to the SeoTools server. We recommend opening up a proxy and using this option when registering. Here is a guide:
https://seotoolsforexcel.com/407-proxy-authentication-required/

Also, you should get the latest version, 8.0.9 is old!
https://seotoolsforexcel.com/download-seotools/