Contao 5.3 / contao-entity-import-bundle 0.252 – Quick import doesn't work

[pindo-bindo]

Hi,
when clicking "Quick import" the system throws the following error:

HeimrichHannot\UtilsBundle\Util\ModelUtil::findModelInstanceByPk(): Argument #2 ($pk) must be of type string|int, null given, called in /www/htdocs/w01bc65f/.../vendor/heimrichhannot/contao-entity-import-bundle/src/EventListener/DataContainer/EntityImportQuickConfigContainer.php on line 70

Thanks for checking!