Fatal error: Uncaught Error: Interface 'JsonSerializable' not found in /home/reviewmanager/public_html/vendor/laravel/framework/src/Illuminate/Support/Collection.php:18 Stack trace: #0 /home/reviewmanager/public_html/vendor/composer/ClassLoader.php(444): include() #1 /home/reviewmanager/public_html/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile('/home/reviewman...') #2 [internal function]: Composer\Autoload\ClassLoader->loadClass('Illuminate\\Supp...') #3 /home/reviewmanager/public_html/vendor/laravel/framework/src/Illuminate/Support/helpers.php(393): spl_autoload_call('Illuminate\\Supp...') #4 /home/reviewmanager/public_html/vendor/laravel/framework/src/Illuminate/Foundation/Exceptions/Handler.php(95): collect(Array) #5 /home/reviewmanager/public_html/vendor/laravel/framework/src/Illuminate/Foundation/Exceptions/Handler.php(61): Illuminate\Foundation\Exceptions\Handler->shouldntReport(Object(Symfony\Component\Debug\Exception\FatalThrowableError)) #6 /home/reviewmanager/public_html/app/Exceptions/Hand in /home/reviewmanager/public_html/vendor/laravel/framework/src/Illuminate/Support/Collection.php on line 18