# Backend nicht erreichbar

**URL:** <https://forum.shopware.com/t/backend-nicht-erreichbar/70355>\
**Category:** Allgemein\
**Created:** [21. Oktober 2020 um 13:09 UTC](https://forum.shopware.com/t/backend-nicht-erreichbar/70355 "2020-10-21T13:09:33Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Hrkndgn](https://avatars.discourse-cdn.com/v4/letter/h/49beb7/32.png) [@Hrkndgn](https://forum.shopware.com/u/Hrkndgn)\
**Post date:** [21. Oktober 2020 um 13:09 UTC](https://forum.shopware.com/t/backend-nicht-erreichbar/70355/1 "2020-10-21T13:09:33Z")

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Hello All,

&nbsp;

I need some help here to fix an issue with my Shopware Site.

This website was Shopware 5.1.3 and I made the update to 5.6.8. I made the Major updates one by one and checked the Backend and Frontend for any errors.

When I came to 5.6.8 everything was working but after clearing the cache&nbsp;Backend was not found with HTTP500 error.

Stack Trace:

[21-Oct-2020 15:04:34 Europe/Berlin] PHP Fatal error: &nbsp;Uncaught Error: Undefined class constant ‘REVISION’ in /html/shopware/var/cache/production\_202008121209/templates/backend\_en\_GB\_5b766/86/39/4a/86394a60a37ba26d8925d5409ca4656a55f7597f.snippet.menu\_entry.tpl.php:205  
Stack trace:  
#0 /html/shopware/var/cache/production\_202008121209/templates/backend\_en\_GB\_5b766/86/39/4a/86394a60a37ba26d8925d5409ca4656a55f7597f.snippet.menu\_entry.tpl.php(69): content\_5f902a4114e354\_03355628(Object(Enlight\_Template\_Default))  
#1 /html/shopware/engine/Library/Smarty/sysplugins/smarty\_internal\_templatebase.php(180): content\_5f902a411af0e6\_05746088(Object(Enlight\_Template\_Default))  
#2 /html/shopware/engine/Library/Enlight/View/Default.php(295): Smarty\_Internal\_TemplateBase-\>fetch()  
#3 /html/shopware/engine/Library/Enlight/Controller/Plugins/ViewRenderer/Bootstrap.php(212): Enlight\_View\_Default-\>render(Object(Enlight\_Template\_Default))  
#4 /html/shopware/engine/Library/Enlight/Controller/Plugins/ViewRenderer/Bootstrap.php(238): Enlight\_Controller\_Plugins\_ViewRenderer\_Bootstrap-\>renderTe in /html/shopware/var/cache/production\_202008121209/templates/backend\_en\_GB\_5b766/86/39/4a/86394a60a37ba26d8925d5409ca4656a55f7597f.snippet.menu\_entry.tpl.php on line 205  
&nbsp;

Domain:

[http://slowmioupdate.mw.imc-hosting.de/backend/](http://slowmioupdate.mw.imc-hosting.de/backend/)

Can anyone please help me with the situation?

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<div class="post-metadata">

**Author:** ![SmartStylez](https://avatars.discourse-cdn.com/v4/letter/s/a88e4f/32.png) [@SmartStylez](https://forum.shopware.com/u/SmartStylez)\
**Post date:** [21. Oktober 2020 um 13:24 UTC](https://forum.shopware.com/t/backend-nicht-erreichbar/70355/2 "2020-10-21T13:24:42Z")

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Try to delete the content of your cache folder on the server.

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<div class="post-metadata">

**Author:** ![Hrkndgn](https://avatars.discourse-cdn.com/v4/letter/h/49beb7/32.png) [@Hrkndgn](https://forum.shopware.com/u/Hrkndgn)\
**Post date:** [21. Oktober 2020 um 13:44 UTC](https://forum.shopware.com/t/backend-nicht-erreichbar/70355/3 "2020-10-21T13:44:19Z")

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I did it already but still getting the same error.

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<div class="post-metadata">

**Author:** ![R4M](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.shopware.com/r4m/32/9983_2.png) [@R4M](https://forum.shopware.com/u/R4M)\
**Post date:** [21. Oktober 2020 um 14:09 UTC](https://forum.shopware.com/t/backend-nicht-erreichbar/70355/4 "2020-10-21T14:09:41Z")

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> **[Shopware 5 - Tutorials & FAQs -Debugging error messages in Shopware](https://docs.shopware.com/en/shopware-5-en/tutorials-and-faq/debugging-error-messages-in-shopware?category=shopware-5-en%2Ftutorials-and-faq)**