Fatal error: Uncaught Error: Interface 'JsonSerializable' not found in /home/worldsch/public_html/knowledgesharepoint.in/testutil_v2/vendor/laravel/framework/src/Illuminate/Http/Resources/Json/JsonResource.php:18 Stack trace: #0 {main} thrown in /home/worldsch/public_html/knowledgesharepoint.in/testutil_v2/vendor/laravel/framework/src/Illuminate/Http/Resources/Json/JsonResource.php on line 18