Not sure if this is specific to my login or other users are seeing this.
I am logged in, however, when I click on the search icon (upper right on the header / navbar), I get a hover which indicates that I need to login.
BUT, I am logged in.
Ignore this please. Seems to work now.
currently the search seems to be broken since everything redirects to 404...
reported on github
Thanks for reporting. Fixed in https://github.com/NodeBB/NodeBB/commit/9170ee831aefddc2ec4ddeff69098fb7ec6e07a4
This is fixed on master now, the problem was a missing error callback here and some more error checking in the imgur plugin here