Malformed UTF-8 characters, possibly incorrectly encoded in Laravel

If anyone suggest how to solve following error in laravel 5.5. PHP versions : 7.2* Laravel : 5.5 "message": "Malformed UTF-8 characters, possibly incorrectly encoded", "exception": "InvalidArgumentException", "file":"/var/www/html/XXXXXX/vendor/laravel/framework/src/Illuminate/Http/J sonResponse.php", "line":75

via Chebli Mohamed