The reason seems to be a bad npm-shrinkwrap.json (listing versions not covered by package.json) @julian @tomanagle to get it running it's the easiest to remove the npm-shrinkwrap.json and run ./nodebb upgrade once more. EDIT: Reported on github: gh#4310 Thanks for reporting!

You should never test two plug-ins doing similar thing at the very same time. You'll end up in a situation you have right now. There was an issue "Facebook login disappears on activation of sso-twitter" in nodebb-plugin-sso-facebook repo. And if you can reproduce it on a fresh install you may open an issue here: https://github.com/julianlam/nodebb-plugin-sso-facebook/issues

@tomanagle can you get to the forum by using domain:port?