Update 5.4.6 > 5.5.3 - Frontend & Backend nicht mehr erreichbar

Nach dem Update auf 5.5.3 sind das Frontend und das Backend nicht mehr erreichabar!

Fatal error: Uncaught exception 'Doctrine\ORM\Mapping\MappingException' with message 'No mapping found for field 'customerGroup' on class 'Shopware\Models\Attribute\CustomerGroup'.' in /var/www/proconcept/incoming/htdocs/_test/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/MappingException.php:163 Stack trace: #0 /var/www/proconcept/incoming/htdocs/_test/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php(1243): Doctrine\ORM\Mapping\MappingException::mappingNotFound('Shopware\\Models...', 'customerGroup') #1 /var/www/proconcept/incoming/htdocs/_test/engine/Library/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php(802): Doctrine\ORM\Mapping\ClassMetadataInfo->getAssociationMapping('customerGroup') #2 /var/www/proconcept/incoming/htdocs/_test/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php(2626): Doctrine\ORM\Persisters\Entity\BasicEntityPersister->loadOneToOneEntity(Array, Object(Shopware\Models\Customer\Group)) #3 /var/www/proconcept/incoming/htdocs/_test/vendor/doctrine/orm/lib/Doctrine/ORM/Interna in /var/www/proconcept/incoming/htdocs/_test/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/MappingException.php on line 163

SyntaxError: Unexpected token <
    at https://shop.pro-concept.net/_test/engine/Library/ExtJs/ext-all.js?:21:5361
    at Object.Ext.globalEval (https://shop.pro-concept.net/_test/engine/Library/ExtJs/ext-all.js?:21:5369)
    at Object.success (https://shop.pro-concept.net/_test/backend/base?file=bootstrap&:530:5)
    at Object.callback (https://shop.pro-concept.net/_test/engine/Library/ExtJs/ext-all.js?:21:67496)
    at i.onComplete (https://shop.pro-concept.net/_test/engine/Library/ExtJs/ext-all.js?:21:422670)
    at i.onStateChange (https://shop.pro-concept.net/_test/engine/Library/ExtJs/ext-all.js?:21:422314)
    at XMLHttpRequest. (ht

 

Komisch ich sehe das Frontend?