Have you tried on different computers / browsers?
Just got it working. Or seems to be. Been stable for a bit now and the admin page is back.
Had to replace the URL of the site, with localhost:localport
~~I used to be able to install NodeBB on openshift for one time but I cant do it anymore.
I get this error when I do git pull --no-edit -s recursive -X theirs upstream v0.9.x
fatal: unable to access 'https://github.com/NodeBB/NodeBB.git/': error setting certificate verify locations:~~ CAfile: C:/Program Files (x86)/Git/mingw32/ssl/certs/ca-bundle.crt CApath: none