fire appendBefore 500 server error

[gabyrusu]

Hi, guys. I'm trying to use this theme in App\Execeptions\Handler.php to customize the error messages but it seams like this line:

413: $this->fire('appendBefore', $this);

generates a 500 server error with no other error message. If I comment this line it's ok, but I'm not sure of it's purpose so I'm not willing to use this as a long term solution.

it happens only on this particular case. Every where else in my project is fine.

Can you help me?

Thanks!