Hi paky50
It relates to the layout configuration only, in backend >> Extensions >> Templates >> you set 'JA_Nuevo - Features Intro' as default template style.
However, this style is loading 'feature-intro' layout (you can see in the layout tab) which doesn't show the 'component' block of a page so there is no content show up.
You can assign this 'JA_Nuevo - Features Intro' style to special layout page like Homepage, for example. And set 'JA_Nuevo - Default' as default template style on your site instead.
Regards