I've got "Internal server error" just like that. I didn't change any code or template.

This is probably the problem of Website Builder as I can normally go to /web/database/selector, select the database and login. I can also browse and use the odoo backend.

The problem is only on a website. I would remove the Website Builder app but we already created a nice website :(

I've tried updating all modules (running with "-u all" option) and that didn't help.

This is the output I get on the terminal:  http://pastebin.com/FfdpNfmX

Please help!