Output error Order confirmation

[uschmi]

When trying to view the order confirmation, I get the following output (printing the order confirmation works fine):
jos-Error:

JSite -> initialise() @ /www/htdocs/w00f0ad4/shop/index.php:30
JApplication -> initialise() @ /www/htdocs/w00f0ad4/shop/includes/application.php:116
JApplication -> triggerEvent() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/application/application.php:230
JDispatcher -> trigger() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/application/application.php:642
JEvent -> update() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/event/dispatcher.php:161
call_user_func_array() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/event/event.php:71
plgSystemFabrik -> onAfterInitialise()
JFactory :: getDocument() @ /www/htdocs/w00f0ad4/shop/plugins/system/fabrik/fabrik.php:53
JFactory :: createDocument() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/factory.php:192
JDocument :: getInstance() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/factory.php:864
JDocumentpdf -> __construct() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/document/document.php:297
JError :: raiseError() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/document/pdf/pdf.php:58
JError :: raise() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/error/error.php:251
JError :: throwError() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/error/error.php:176
call_user_func_array() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/error/error.php:214
JError :: handleCallback()
call_user_func() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/error/error.php:765
plgSystemRedirect :: handleError()
JError :: customErrorPage() @ /www/htdocs/w00f0ad4/shop/plugins/system/redirect/redirect.php:109
JDocumentError -> render() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/error/error.php:798
JDocumentError -> _loadTemplate() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/document/error/error.php:107
require_once() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/document/error/error.php:135
JFactory :: getDocument() @ /www/htdocs/w00f0ad4/shop/templates/system/error.php:14
JFactory :: createDocument() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/factory.php:192
JDocument :: getInstance() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/factory.php:864
JDocumentpdf -> __construct() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/document/document.php:297
JError :: raiseError() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/document/pdf/pdf.php:58
JError :: raise() @ /www/htdocs/w00f0ad4/shop/libraries/joomla/error/error.php:251

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Joomla 2.5.7 / Virtuemart 2.0.12f