Just finished installing PlexConnect manually following the official guide. I got stuck in the "serving application.js" and took me few hours of debugging to realise that on unRAID you need to have Python 2.7.3. With Python 2.6.6 it gets stuck and with 2.7.5 "python PlexConnect.py" throws exceptions. In the PlexConnect wiki both 2.6.x and 2.7.x are listed as working but at least on unRAID this does not seem to be the case.
I am having the same problem. After typing the command I am getting the same error message. Where do I begin to troubleshoot this?
I suggest that you first try running the PlexConnect in the foreground so that you see it's output. You do this simply by leaving out the nohup from the beginning and the & from the end. So the command should be:
python /mnt/cache/apps/plexconnect/PlexConnect.py
You can then quit the process with ctrl-c.
Then you can try the background running by adding the nohup and & and the command line should be (notice that there are no quotation marks).
Also note that at least for me Python 2.6.6 did not work (see this message), instead I had to use 2.7.3 with the latest PlexConnect. And I assume that you have followed the updated https-based installation with certificate creation and profile importing (also linked in the referenced message)?