When working with Laravel Passport, a popular OAuth2 server package for Laravel applications, you might encounter an error stating “oauth-private.key does not exist or is not readable.” This error typically occurs when the necessary Passport keys are missing or not generated.

The error message “oauth-private.key does not exist or is not readable” is an indication that Laravel Passport is unable to locate the private key required for OAuth2 authentication. Passport relies on keys to secure the authentication process, and if these keys are missing or not generated, it can lead to authentication failures.

Solution:

Generate Passport Keys:

Run the following Artisan command to generate the Passport keys:

php artisan passport:keys

This command will generate the necessary encryption keys used by Passport. Make sure to run it whenever you encounter the mentioned error or during the initial setup of Laravel Passport.

After generating the keys, it’s a good practice to clear the configuration cache to ensure that the changes take effect:

php artisan config:cache
php artisan view:clear