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

Do you have all the necessary extensions installed on the server?

• PHP >= 5.5.9
• OpenSSL PHP Extension
• PDO PHP Extension
• Mbstring PHP Extension
• Tokenizer PHP Extension

It could be that you're missing the OpenSSL extension. Also, do you have the key set in .env file?

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Try running:

php artisan key:generate

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Answer: the 'cipher' => '' was not set.