[Solved] authentication.php Blank page

[Ledsko]

Hi Prestashoppers!

I had the problem with the authentication.php blank page.
Before the error i changed a line in classes/mail.php

$templateVars['{shop_logo}'] = (file_exists(_PS_IMG_DIR_.'logo.jpg')) ? $message->attach(new Swift_Message_Image(new Swift_File(_PS_IMG_DIR_.'logo.jpg'))) : '';

The part with logo.jpg i changed.

After the change i had a blank page at authentication.php.
Now i change it back to normal and everything works well.

I hope this topic can help other people with the same problem.

best regards,
Marco