Hi:
Just done a fresh install of blinker_quickstart_j3_v1.6 plus all required demo modules.
Public frontend is showing the correct demo content for the template - see https://www.waterexpress.com.au/new/.
However, in the Joomla! v3.9.28 Admin backend when I go menu [SP Page Builder] -> [Pages], no pages are shown?
Also, frontend editing via Page Builder isn't active.