mytickets page => white page with Internal error

Originally reported on Google Code with ID 451

```

1. Update 1.5 to 1.6
2. Visit /mytickets page
3. I got a white page with "Internal error"

I'm on Debian. 

Summary :

Since my update Gitblit 1.6.0, on mytickets page i get a white page with "Internal
error" message. You know what it can be?


```

Reported by `gato84b` on 2014-06-20 06:30:43
