Email attachment functionality not working in Drupal website

Question

After upgrading to Drupal 9 and PHP 8 versions, I cannot send emails with attachments. We are encountering the following issues

PHPMailer\PHPMailer\Exception: Unable to access file: in PHPMailer\PHPMailer\PHPMailer->addAttachment() (line 3182 of vendor/phpmailer/phpmailer/src/PHPMailer.php).

Answer 1

As the error says, this means that your script cannot access the file you asked it to attach.

I recommend checking the ownership and permissions of the relevant files.