Sorry for starting the same rant again, over and over.
This well-known blocker is open for months:
Plone 5.1.4 has been released with this blocker being still open.
It is still impossible to setup a new Plone environment - even without add-ons.
This simple buildout (no dependencies)
still fails when you create a new site.
Why aren't blockers blocking a release?
Why are new releases shipped with this horrible error where it is so obvious that you can not create a new site!?
I would like to hear an official answer from the Plone release management.