# Update 5.4.6 \> 5.5.3 - Frontend & Backend nicht mehr erreichbar

**URL:** <https://forum.shopware.com/t/update-5-4-6-5-5-3-frontend-backend-nicht-mehr-erreichbar/56275>\
**Category:** Administration\
**Created:** [7. November 2018 um 10:33 UTC](https://forum.shopware.com/t/update-5-4-6-5-5-3-frontend-backend-nicht-mehr-erreichbar/56275 "2018-11-07T10:33:21Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![houmem](https://avatars.discourse-cdn.com/v4/letter/h/df788c/32.png) [@houmem](https://forum.shopware.com/u/houmem)\
**Post date:** [7. November 2018 um 10:33 UTC](https://forum.shopware.com/t/update-5-4-6-5-5-3-frontend-backend-nicht-mehr-erreichbar/56275/1 "2018-11-07T10:33:21Z")

</div>

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

```

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<div class="post-metadata">

**Author:** ![weater](https://avatars.discourse-cdn.com/v4/letter/w/ad7895/32.png) [@weater](https://forum.shopware.com/u/weater)\
**Post date:** [7. November 2018 um 10:37 UTC](https://forum.shopware.com/t/update-5-4-6-5-5-3-frontend-backend-nicht-mehr-erreichbar/56275/2 "2018-11-07T10:37:07Z")

</div>

Komisch ich sehe das Frontend?&nbsp;

&nbsp;