[Solved] cannot activate eblocker

I cannot activate E-Blocker.
When I call up the activation wizard
in the 2nd step, accept the license agreement window
 and in the window in which the determinations should appear
 comes the message
"License terms could not be loaded. An internet connection is required".
I can't get any further there and have to break off.
With my browser, Firefox, I can establish connections to the Internet as normal.

My system:
PC with Windows 10
Fritzbox 6490

The releases for the eblocker are available in the Fritzbox menu.

How do I get on now

Richard