Password Length isse

I don’t have a install of OMP 3.1.1-4 to reference, so I’m just basing my comments on the code itself.

It appears the siteSetupForm is a tab alongside the languages, plugins, and navigation menu:

In OJS, I think the equivalent would be Admin → Administration → Site Settings, but this might also depend on whether you have multiple presses enabled or just a single press enabled. In OJS if you have only one journal enabled, this “Site Settings” link is hidden.