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

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You can fix this issue in laravel 6, laravel 7, laravel 8, laravel 9, laravel 10 and laravel 11 versions.

This error message typically occurs in Laravel when you haven't set the application encryption key.

To generate an application encryption key, you can use the following command in your terminal:

Solution:

php artisan key:generate

This will generate a random key and set it in your .env file.

If you're still encountering the error after generating the key, make sure that the key is set correctly in your .env file. You can also try clearing your configuration cache by running the following command:

php artisan config:clear

This will clear any cached configuration values and force Laravel to reload them from the .env file.

I hope it can help you...