Getting json response error

[ruslander-rulez]

framework/src/Illuminate/Testing/TestResponse.php

Line 890 in 30e1fd3

if ($this->exception) {

This line throws the exception:

ErrorException : Undefined property: Symfony\Component\HttpFoundation\StreamedResponse::$exception /var/www/html/vendor/laravel/framework/src/Illuminate/Testing/TestResponse.php:1247
 /var/www/html/vendor/laravel/framework/src/Illuminate/Testing/TestResponse.php:823
 /var/www/html/vendor/laravel/framework/src/Illuminate/Testing/TestResponse.php:561