Fatal error: Uncaught Error: Interface 'JsonSerializable' not found in /home/worldsch/public_html/knowledgesharepoint.in/testutil_v3/vendor/laravel/framework/src/Illuminate/View/ComponentAttributeBag.php:18 Stack trace: #0 {main} thrown in /home/worldsch/public_html/knowledgesharepoint.in/testutil_v3/vendor/laravel/framework/src/Illuminate/View/ComponentAttributeBag.php on line 18