If you have permission to view multiple sites within your organisation, the blueprint button only becomes active when you have filtered the dashboard view by Site.
To do this, tap the Filter button to the left of the organisation name. Tap Site, which will expand the site name field. You can either search for your chosen site or select it from the list. Once you have selected your site, the site chip will be added to the right of your organisation chip and the Blueprint button will turn blue and become active.
After selecting a site, the site chip will be added to the right of the organisation chip and the Blueprint Button will turn blue and become active.