[negge]

First of all I want to thank all the developers working on it

Thanks (it's just me though)!

Second: sometimes it is needed to load the mod_rewrite in Apache in order to let xvs to work so it may be a good idea to note that in installation guide (this was my case in Ubuntu, it's quite strange indeed that mod_rewrite was not loaded).

It's right there in the installation instructions.

When I try to access to my Movie / TV Shows library what I get is an Error 500 (this is what Chrome console says) and in the log I have this:
http://paste.ubuntu.com/6349903/

It means you've entered the wrong credentials.