Laravel – Address::__construct(): Argument #1 ($address) must be of type string, null given

sender address set. Swiftmailer works without it (laravel 8) while symfony mailer does not (laravel 9)

Its come when you do not define mail from address and it may be happen because your env function not get value.

Solution

Run below commends

php artisan config:cache
php artisan config:clear