Race2024 To be honest, I am running out of ideas what is going wrong. As you can see, it works for thousands of other users, otherwise this forum would be fludded with reports like that, but it is not.
It does not seem to be VPN. We can’t blame your network provider either since you obviously can connect to this forum, and it is hosted on the same server as licensing server. And when you activate, you do that without issues too, so connection to the licensing server works.
In the latest version (1.9.15) there were small tweaks in the licensing behavior, but that should address the cases when you don’t use Tonfotos for really long periods, like months. So it does not seem to be your case, but since we don’t really know what is happening anyway, I would propose to wait and see if the problem will remain with the lattest version. It it will, hopefully we will have more info that would help us identify the root cause.