Bestellung wird nicht ausgelöst

Hallo
habe einen shop nach Anleitung eingerichtet. Alles funktioniert bis auf:
Wenn die Bestellung ausgelöst wird, wird das Mail an den Empfänger gesendet, die Bestellung wird aber nicht als solche registriert. Auch erscheint eine Fehlermeldung
(Der Shop ist hier: http://wp12220320.server-he.ch/busch.../kiosk-12.html)

[24-Nov-2015 13:27:22 Europe/Zurich] PHP Fatal error: Uncaught exception 'RuntimeException' with message 'The registry already contains an instance for tl_iso_address::id()' thrown in /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/library/Contao/Model/Registry.php on line 180
#0 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/library/Contao/Model.php(699): Contao\Model\Registry->register(Object(Isotope\Model\Address))
#1 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/library/Contao/Model.php(689): Contao\Model->attach()
#2 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/library/Contao/Model.php(750): Contao\Model->detach(true)
#3 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/library/Isotope/Model/Config.php(120): Contao\Model->preventSaving()
#4 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/templates/document/iso_document_default.html5(11): Isotope\Model\Config->getOwnerAddress()
#5 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/library/Contao/BaseTemplate.php(88): include('/is/htdocs/wp12...')
#6 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/library/Contao/Template.php(277): Contao\BaseTemplate->parse()
#7 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/classes/FrontendTemplate.php(46): Contao\Template->parse()
#8 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/library/Isotope/Model/Document/Standard.php(163): Contao\FrontendTemplate->parse()
#9 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/library/Isotope/Model/Document/Standard.php(112): Isotope\Model\Document\Standard->generateTemplate(Object(Isotope\Model\ProductCo ll ection\Order), Array)
#10 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/library/Isotope/Model/Document/Standard.php(47): Isotope\Model\Document\Standard->generatePDF(Object(Isotope\Model\ProductCollect io n\Order), Array)
#11 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/library/Isotope/Model/ProductCollection/Order.php(443): Isotope\Model\Document\Standard->outputToFile(Object(Isotope\Model\ProductCollec ti on\Order), '/is/htdocs/wp12...')
#12 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/library/Isotope/Model/ProductCollection/Order.php(262): Isotope\Model\ProductCollection\Order->getNotificationTokens('4')
#13 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/library/Isotope/Model/ProductCollection/Order.php(181): Isotope\Model\ProductCollection\Order->updateOrderStatus('1')
#14 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/library/Isotope/Model/Payment/Cash.php(39): Isotope\Model\ProductCollection\Order->checkout()
#15 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/library/Isotope/Module/Checkout.php(141): Isotope\Model\Payment\Cash->processPayment(Object(Isotope\Model\ProductColl ec tion\Order), Object(Isotope\Module\Checkout))
#16 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/modules/Module.php(282): Isotope\Module\Checkout->compile()
#17 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/library/Isotope/Module/Module.php(112): Contao\Module->generate()
#18 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/isotope/library/Isotope/Module/Checkout.php(85): Isotope\Module\Module->generate()
#19 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/elements/ContentModule.php(59): Isotope\Module\Checkout->generate()
#20 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/library/Contao/Controller.php(476): Contao\ContentModule->generate()
#21 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/modules/ModuleArticle.php(213): Contao\Controller::getContentElement(Object(Contao \ContentModel), 'main')
#22 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/modules/Module.php(282): Contao\ModuleArticle->compile()
#23 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/modules/ModuleArticle.php(67): Contao\Module->generate()
#24 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/library/Contao/Controller.php(409): Contao\ModuleArticle->generate(false)
#25 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/library/Contao/Controller.php(269): Contao\Controller::getArticle(Object(Contao\Articl eModel), false, false, 'main')
#26 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/pages/PageRegular.php(133): Contao\Controller::getFrontendModule('0', 'main')
#27 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/system/modules/core/controllers/FrontendIndex.php(267): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#28 /is/htdocs/wp12220320_CDULR11J64/www/buschiandanni.v4/index.php(20): Contao\FrontendIndex->run()
#29 {main}