Blogger Installation problem: both widget or template procedure fail!

Hello.

I've tried both the template install than the widget install.

During the widget install I obtain 2 errors: the former for the widget itself

"sectionId: Required field must not be blank"

the latter for the template:

"error code bX-s1feoa"
"blogID: 9026543428336864975"
"host: www.blogger.com"
"url: /add-widget.do"

Obviously if I try the template installation, I obtain only the "error code bX-s1feoa" error.

I use a standard Blogger template.

So: what is the problem with this installation?

Below you can see a screenshot of the problem.