Where is "@import url" located?

Hi!
I have a Montserrat font project based.
I have used a 900 weight font (like ultra black).
In internal blocs preview is all ok.
When export all project , I see in online index (head section) this string:

@import url(https://fonts.googleapis.com/css?family=Lato:600,500,400,300);

This string cannot permit to see 900 weight Montserrat font.
(if I change to: family=Montserrat:900 the browser rendering works fine).

So where is located in blocs this string?

Thanks!

That looks like the project main settings import font statement
Are you sure in the blocs project settings for fonts you’ve set the correct Montserrat font?

This is project setting. Do you think about?
Thanks!
Schermata 2021-04-06 alle 21.38.54

Any suggestions?

This looks like you’ve successfully added the font so it should be loaded in the head of the site
It works fine on my end…

Have you perhaps tried to re-save and re-export the site?