Fatal error: Uncaught Error: Interface "Ergebnis\Json\Normalizer\Normalizer" not found in /home/myclienteu/mobileo-cms/vendor/ergebnis/json-normalizer/src/Vendor/Composer/VersionConstraintNormalizer.php:21 Stack trace: #0 {main} thrown in /home/myclienteu/mobileo-cms/vendor/ergebnis/json-normalizer/src/Vendor/Composer/VersionConstraintNormalizer.php on line 21