laravel No supported encrypter found. The cipher and / or key length are invalid

Question

I am building a project using Laravel. It was working fine on localhost, but when I upload it to the server (the server has comodo ssl installed), I receive the following er

Answer 1

write in console php artisan key:generate

you will get message like: Application key [get 32 char key] set successfully.

replace app key in config/app.php like 'key' => env('APP_KEY', 'insert get 32 char key'),//line number 81