I cannot activate the trial version.

I am referring to the following page.

https://support.captureone.com/hc/en-us/articles/360002468637-Opening-Capture-One-for-the-first-time

When I enter "Email" on the "Welcome to capture one" screen, the screen displays "Unable to connect to server" in red text.

environment:

　　OS: Windows7 (64bit)

　　.Net: 4.8.03761

How can I get rid of this error?