Extension GoFullPage "couldn't be verified"

Avast Secure Browser Avast Secure Browser for Windows
1

I tried installing the Avast Trusted extension GoFullPage, and every time I would get a message ending with “couldn’t be verified”.

Here you can see the screencast: https://www.youtube.com/watch?v=pYEqA8IaGQ8

I have Windows 10 (64bit)

What could be the problem?

Thanks

2

Posting twice is never helpful and only adds confusion.
See a reply on to your original post here,
https://forum.avast.com/index.php?topic=285292.msg1630828#msg1630828

3

I am terribly sorry.

First I was experiencing the problem I describe here, and I posted this message. Then, I experienced the error I describe on post https://forum.avast.com/index.php?topic=285292.msg1630812#msg1630812 and since the error was different (the app downloading and installing in an application I do not have in my system) I decided to publish a new post.

Thanks for the feedback.