I just updated my Magento instalation from 2.3.3 to 2.3.6. 

Everything seamed to fine except when I do reindex. I get this error:

    
PHP Fatal error:  Uncaught Error: Cannot instantiate interface Magento\InventoryCatalogApi\Model\GetProductTypesBySkusInterface in /chroot/home/a96f0e0b/stores.etailhandel.no/html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:121
Stack trace:
#0 /chroot/home/a96f0e0b/stores.etailhandel.no/html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(108): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Magento\\Invento...', Array)
#1 /chroot/home/a96f0e0b/stores.etailhandel.no/html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(150): Magento\Framework\ObjectManager\Factory\Compiled->create('Magento\\Invento...')
#2 /chroot/home/a96f0e0b/stores.etailhandel.no/html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(79): Magento\Framework\ObjectManager\Factory\Compiled->get('Magento\\Invento...')
#3 /chroot/home/a96f0e0b/stores.etailhandel.no/html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(150): Magento\Framework\ObjectManager\Factory\Compiled-> in /chroot/home/a96f0e0b/stores.etailhandel.no/html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php on line 121

Do anyone know what this means? And can anyone help me please.