Thanks, but next time please choose a text file hosting that doesn't require me to wait a minute before downloading, for example, http://gist.github.com

If you can, please check the URLs of graph images on the pages, and try opening them directly.
Otherwise please save Munin page as HTML and post it somewhere, and I'll check everything myself. 

Hello Etienne,

1) Have you configured Munin plugin with URL, username and password (if required)?
2) Can you see host list in Munin plugin
3) Can you see graph titles (even without images) in the plugin?

Looks like you are accessing HTTP server with HTTPS or vice versa.

My apologies. I actually meant python-exconsole package.

Please upgrade python-catcher package

Could you please include full traceback?

Which shell are you using? I have checked and this indeed happens, but only for dash, not for bash/zsh

Fix committed.

If you have enabled OS sync, you now need to use password of OS' root user to log into Ajenti.