I'm not sure how this setting ended up in proxy.conf, but I sure didn't intend to put it there. Fix released.

1. Check ajenti-panel -v output.
2. Test network connectivity by running netcat: nc -l 8000 and try opening :8000 in your browser.
P.S. opening three topics with same content can get you banned instead of getting help.

Are you using Ubuntu repository? 1.5.3-1~bpo60 is a package from our Debian repository, Ubuntu one is 1.5.3-2

Are passlib files installed in /usr/lib/python2.7/dist-packages/passlib ?

What's the package's version?

See, your error is about a completely different module :/
Is python-passlib installed? What is passlib.__version__? (import passlib).

Can you double check that your error is the same as original poster's? It doesn't look so, your socketio installation seems fine.

What's the output of following Python code?

>>> import socketio
>>> print socketio.__version__

You can still use v0.3.5 from the repo (select it with e.g. aptitude)

Your traceback includes python2.6 paths?