
<br />
<b>Fatal error</b>:  Uncaught GuzzleHttp\Exception\ClientException: Client error: `POST https://api.mailgun.net/v2/kadr.az/messages` resulted in a `400 BAD REQUEST` response:
{
  &quot;message&quot;: &quot;Subscription Canceled&quot;
}
 in /home/customer/www/finstaff.az/public_html/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php:111
Stack trace:
#0 /home/customer/www/finstaff.az/public_html/vendor/guzzlehttp/guzzle/src/Middleware.php(65): GuzzleHttp\Exception\RequestException::create(Object(GuzzleHttp\Psr7\Request), Object(GuzzleHttp\Psr7\Response))
#1 /home/customer/www/finstaff.az/public_html/vendor/guzzlehttp/promises/src/Promise.php(203): GuzzleHttp\Middleware::GuzzleHttp\{closure}(Object(GuzzleHttp\Psr7\Response))
#2 /home/customer/www/finstaff.az/public_html/vendor/guzzlehttp/promises/src/Promise.php(156): GuzzleHttp\Promise\Promise::callHandler(1, Object(GuzzleHttp\Psr7\Response), Array)
#3 /home/customer/www/finstaff.az/public_html/vendor/guzzlehttp/promises/src/TaskQueue.php(61): GuzzleHttp\Promise\Promise::GuzzleHttp\Promise\{c in <b>/home/customer/www/finstaff.az/public_html/vendor/php-http/guzzle6-adapter/src/Promise.php</b> on line <b>127</b><br />