Server 500 error for all urls; front and admin

Shopware 6 (English)
1

Discovered the site’s been down for quite a while, logs are full of the following repeating message:

php.CRITICAL: Uncaught Error: Shopware\Core\Framework\DataAbstractionLayer\EntityDefinition::decode(): Argument #2 ($value) must be of type ?string, int given, called in /homepages/43/d416919653/htdocs/fab.prims.com/vendor/shopware/core/Framework/DataAbstractionLayer/Dbal/EntityHydrator.php on line 198 {„exception“:„[object] (TypeError(code: 0): Shopware\Core\Framework\DataAbstractionLayer\EntityDefinition::decode(): Argument #2 ($value) must be of type ?string, int given, called in /homepages/43/d416919653/htdocs/fab.prims.com/vendor/shopware/core/Framework/DataAbstractionLayer/Dbal/EntityHydrator.php on line 198 at /homepages/43/d416919653/htdocs/fab.prims.com/vendor/shopware/core/Framework/DataAbstractionLayer/EntityDefinition.php:335)“}
[2024-04-04T18:30:48.391496+00:00] request.CRITICAL: Uncaught PHP Exception TypeError: „Shopware\Core\Framework\DataAbstractionLayer\EntityDefinition::decode(): Argument #2 ($value) must be of type ?string, int given, called in /homepages/43/d416919653/htdocs/fab.prims.com/vendor/shopware/core/Framework/DataAbstractionLayer/Dbal/EntityHydrator.php on line 198“ at /homepages/43/d416919653/htdocs/fab.prims.com/vendor/shopware/core/Framework/DataAbstractionLayer/EntityDefinition.php line 335 {„exception“:„[object] (TypeError(code: 0): Shopware\Core\Framework\DataAbstractionLayer\EntityDefinition::decode(): Argument #2 ($value) must be of type ?string, int given, called in /homepages/43/d416919653/htdocs/fab.prims.com/vendor/shopware/core/Framework/DataAbstractionLayer/Dbal/EntityHydrator.php on line 198 at /homepages/43/d416919653/htdocs/fab.prims.com/vendor/shopware/core/Framework/DataAbstractionLayer/EntityDefinition.php:335)“}

Site had been working fine and nothing had changed (though possible an autoupdate was applied?). Given I can’t get in at all, are there any recovery FAQ pointers to get back up and running?

2

Shopware has no auto updates.

Probably a plugin ist not compatible with the installed Shopware version.

Deactivate all Plugins via the CLI or in the database and then activate them again one by one. So you will figure out which one is the trouble maker.