bepado Plugin führt zu Fehler

Hallo, hat jemand Erfahrung mit dem bepado-Plugin in Zusammenwirken mit Libri? Ich habe die ersten Bücher von Libri über das bepado-Plugin in meinem Shop integriert und schon läuft der ganze Shop nicht mehr. Deaktiviere ich das Plugin, läuft wieder alles. Folgende Fehlermeldung bekomme ich, wobei bei der Artikelmenge eine Zahl eingetragen ist. Hat jemand eine Idee bzw. nutzt jemand das Plugin mit Libri? Product Quantity Attribute has to be a number. in Shopware/Plugins/Default/Backend/SwagBepado/Library/Bepado/SDK/Struct/Verificator/Product.php on line 128 Stack trace: #0 Shopware/Plugins/Default/Backend/SwagBepado/Library/Bepado/SDK/Struct/Verificator/Product.php(108): Bepado\SDK\Struct\Verificator\Product->validateUnit(Object(Bepado\SDK\Struct\Product)) #1 Shopware/Plugins/Default/Backend/SwagBepado/Library/Bepado/SDK/Struct/VerificatorDispatcher.php(63): Bepado\SDK\Struct\Verificator\Product->verify(Object(Bepado\SDK\Struct\VerificatorDispatcher), Object(Bepado\SDK\Struct\Product)) #2 Shopware/Plugins/Default/Backend/SwagBepado/Library/Bepado/SDK/Struct/Verificator/OrderItem.php(42): Bepado\SDK\Struct\VerificatorDispatcher->verify(Object(Bepado\SDK\Struct\Product)) #3 Shopware/Plugins/Default/Backend/SwagBepado/Library/Bepado/SDK/Struct/VerificatorDispatcher.php(63): Bepado\SDK\Struct\Verificator\OrderItem->verify(Object(Bepado\SDK\Struct\VerificatorDispatcher), Object(Bepado\SDK\Struct\OrderItem)) #4 Shopware/Plugins/Default/Backend/SwagBepado/Library/Bepado/SDK/SDK.php(316): Bepado\SDK\Struct\VerificatorDispatcher->verify(Object(Bepado\SDK\Struct\OrderItem)) #5 Shopware/Plugins/Default/Backend/SwagBepado/Components/BasketHelper.php(168): Bepado\SDK\SDK->calculateShippingCosts(Object(Bepado\SDK\Struct\Order)) #6 Shopware/Plugins/Default/Backend/SwagBepado/Components/BasketHelper.php(430): Shopware\Bepado\Components\BasketHelper->calculateShippingCosts(‚DEU‘) #7 Shopware/Plugins/Default/Backend/SwagBepado/Subscribers/BasketWidget.php(78): Shopware\Bepado\Components\BasketHelper->recalculate(‚DEU‘) #8 [internal function]: Shopware\Bepado\Subscribers\BasketWidget->fixBasketWidgetForBepado(Object(Enlight_Controller_ActionEventArgs)) #9 Enlight/Event/Handler/Default.php(91): call_user_func(Array, Object(Enlight_Controller_ActionEventArgs)) #10 Enlight/Event/EventManager.php(211): Enlight_Event_Handler_Default->execute(Object(Enlight_Controller_ActionEventArgs)) #11 Enlight/Controller/Action.php(192): Enlight_Event_EventManager->notify(‚Enlight_Control…‘, Object(Enlight_Controller_ActionEventArgs)) #12 Enlight/Controller/Dispatcher/Default.php(528): Enlight_Controller_Action->dispatch(‚infoAction‘) #13 Enlight/Template/Plugins/function.action.php(96): Enlight_Controller_Dispatcher_Default->dispatch(Object(Enlight_Controller_Request_RequestHttp), Object(Enlight_Controller_Response_ResponseHttp)) #14 cache/templates/frontend_emotion_florilegium_de_DE_1/60/17/6d/60176de8ad74aab5e709026aa2f21cc4a2e794d2.snippet.index.tpl.php(377): smarty_function_action(Array, Object(Enlight_Template_Default)) #15 Smarty/sysplugins/smarty_internal_templatebase.php(180): content_53f478f72a1a01_96981811(Object(Enlight_Template_Default)) #16 Enlight/View/Default.php(273): Smarty_Internal_TemplateBase->fetch() #17 Enlight/Controller/Plugins/ViewRenderer/Bootstrap.php(212): Enlight_View_Default->render(Object(Enlight_Template_Default)) #18 Enlight/Controller/Plugins/ViewRenderer/Bootstrap.php(238): Enlight_Controller_Plugins_ViewRenderer_Bootstrap->renderTemplate(Object(Enlight_Template_Default)) #19 Enlight/Controller/Plugins/ViewRenderer/Bootstrap.php(136): Enlight_Controller_Plugins_ViewRenderer_Bootstrap->render() #20 [internal function]: Enlight_Controller_Plugins_ViewRenderer_Bootstrap->onPostDispatch(Object(Enlight_Controller_ActionEventArgs)) #21 Enlight/Event/Handler/Default.php(91): call_user_func(Array, Object(Enlight_Controller_ActionEventArgs)) #22 Enlight/Event/EventManager.php(211): Enlight_Event_Handler_Default->execute(Object(Enlight_Controller_ActionEventArgs)) #23 Enlight/Controller/Action.php(202): Enlight_Event_EventManager->notify(‚Enlight_Control…‘, Object(Enlight_Controller_ActionEventArgs)) #24 Enlight/Controller/Dispatcher/Default.php(528): Enlight_Controller_Action->dispatch(‚indexAction‘) #25 Enlight/Controller/Front.php(228): Enlight_Controller_Dispatcher_Default->dispatch(Object(Enlight_Controller_Request_RequestHttp), Object(Enlight_Controller_Response_ResponseHttp)) #26 Shopware/Kernel.php(141): Enlight_Controller_Front->dispatch() #27 vendor/symfony/http-kernel/Symfony/Component/HttpKernel/HttpCache/HttpCache.php(473): Shopware\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #28 Shopware/Components/HttpCache/AppCache.php(256): Symfony\Component\HttpKernel\HttpCache\HttpCache->forward(Object(Symfony\Component\HttpFoundation\Request), true, NULL) #29 vendor/symfony/http-kernel/Symfony/Component/HttpKernel/HttpCache/HttpCache.php(430): Shopware\Components\HttpCache\AppCache->forward(Object(Symfony\Component\HttpFoundation\Request), true) #30 vendor/symfony/http-kernel/Symfony/Component/HttpKernel/HttpCache/HttpCache.php(330): Symfony\Component\HttpKernel\HttpCache\HttpCache->fetch(Object(Symfony\Component\HttpFoundation\Request), true) #31 Shopware/Components/HttpCache/AppCache.php(178): Symfony\Component\HttpKernel\HttpCache\HttpCache->lookup(Object(Symfony\Component\HttpFoundation\Request), true) #32 vendor/symfony/http-kernel/Symfony/Component/HttpKernel/HttpCache/HttpCache.php(194): Shopware\Components\HttpCache\AppCache->lookup(Object(Symfony\Component\HttpFoundation\Request), true) #33 Shopware/Components/HttpCache/AppCache.php(113): Symfony\Component\HttpKernel\HttpCache\HttpCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #34 shopware.php(91): Shopware\Components\HttpCache\AppCache->handle(Object(Symfony\Component\HttpFoundation\Request)) #35 {main}