My install went ok, I now have NodeBB + Mongo + nginx 1.9.3 (Ubuntu 14) up & running and can login to my admin panel.
Trouble is that - usually when logged in as admin - it only seems to run for a few minutes until I get "No input file specified." in my browser. At this point if I try to access my home page (NodeBB home page) the thin blue NodeBB progress bar is about 80% of the way across the screen and I have a blue progress spinner to the right of the profile icon.
Sometimes I can logout from the profile icon to fix things or failing that a ./nodebb restart will bring everything back to life again. For a while. The log shows:
26/11 18:30  - warn: [plugins/load] The following plugins may not be compatible with your version of NodeBB. This may cause unintended behaviour or crashing. In the event of an unresponsive NodeBB caused by this plugin, run
./nodebb reset -p PLUGINNAME to disable it.
26/11 18:30  - info: NodeBB Ready
26/11 18:30  - info: NodeBB is now listening on: 0.0.0.0:4567
All I've done is follow the install instructions at http://nodebb-francais.readthedocs.org/projects/nodebb/en/latest/installing/os/ubuntu.html - I haven't intentionally added any other plugins at this stage.
Does anyone have any ideas what the problem could be?