Getting Error in Send Grid Configuration [ unexpected '[', expecting ')' in E:\xampp\htdocs\sendgrid-php\lib\helpers\mail\Mail.php on line 37]

Question

While running a code to auto-send an email through Sendgrid APIss, we are getting the following error:

Parse error: syntax error, unexpected '[', expecting ')' in E:\xampp\htdocs\sendgrid-php\lib\helpers\mail\Mail.php on line 37

Below is the mail.php file code:

public function jsonSerialize()
    {
        return array_filter(
            [
                'email' => $this->getEmail()
            ],
            function ($value) {
                return $value !== `enter code here`null;
            }
        ) ?: null;
    }