Argument 3 passed to Lcobucci\JWT\Signer\Hmac::doVerify() must be an instance of Lcobucci\JWT\Signer\Key, null given, called code example

Example: passed to Lcobucci\JWT\Signer\Hmac::doVerify() must be an instance of Lcobucci\JWT\Signer\Key, null given,

php artisan key:generate
php artisan jwt:secret
php artisan cache:clear
php artisan config:clear