Error after Update to Shopware 6.3.0

[oliverriske]

After Update to 6.3.0 from 6.2.3 i get the error:

In ClassExistenceResource.php line 179:

Class “Shopware\Core\Framework\DataAbstractionLayer\EntityExtensionInterface” not found while loading “Nextag\Checkout\Content\OrderExtension”.
 

but the Class is used and refrenced correct. Cache has also been cleaned

What can i do?

[shyim]

This class does not exists anymore. Its deprecated since 6.2

[oliverriske]

@Shyim‍ Schould i extend  \Shopware\Core\Framework\DataAbstractionLayer\EntityExtension instead of implementing this old interface - or what can i do?

[shyim]

yes extend from it

[DeineShisha]

I have the same issue, what did you do exacly?