SendGrid response status code 0 no further information - sendgrid

Question

I am trying to send a mail using the SendGrid PHP API library. It worked when I tried it yesterday but today the reponse just has zero information:
SendGrid\Response Object
(
[statusCode:protected] => 0
[body:protected] =>
[headers:protected] => Array
(
[0] =>
)
)
The following object is being used in the \SendGrid\SendGrid()->send() method:
SendGrid\Mail\Mail Object
(
[from:SendGrid\Mail\Mail:private] => SendGrid\Mail\From Object
(
[name:SendGrid\Mail\EmailAddress:private] => test1
[email:SendGrid\Mail\EmailAddress:private] => test#example.com
[substitutions:SendGrid\Mail\EmailAddress:private] =>
[subject:SendGrid\Mail\EmailAddress:private] =>
)
[subject:SendGrid\Mail\Mail:private] => SendGrid\Mail\Subject Object
(
[subject:SendGrid\Mail\Subject:private] => this is a test
)
[contents:SendGrid\Mail\Mail:private] => Array
(
[0] => SendGrid\Mail\Content Object
(
[type:SendGrid\Mail\Content:private] => text/html
[value:SendGrid\Mail\Content:private] =>
<h1>sending mails</h1>
)
)
[attachments:SendGrid\Mail\Mail:private] =>
[reply_to:SendGrid\Mail\Mail:private] =>
[personalization:SendGrid\Mail\Mail:private] => Array
(
[0] => SendGrid\Mail\Personalization Object
(
[tos:SendGrid\Mail\Personalization:private] => Array
(
[0] => SendGrid\Mail\To Object
(
[name:SendGrid\Mail\EmailAddress:private] => mr test
[email:SendGrid\Mail\EmailAddress:private] => testtest#example.com
[substitutions:SendGrid\Mail\EmailAddress:private] =>
[subject:SendGrid\Mail\EmailAddress:private] =>
)
)
[ccs:SendGrid\Mail\Personalization:private] => Array
(
[0] => SendGrid\Mail\Cc Object
(
[name:SendGrid\Mail\EmailAddress:private] =>
[email:SendGrid\Mail\EmailAddress:private] => testtest1#example.com
[substitutions:SendGrid\Mail\EmailAddress:private] =>
[subject:SendGrid\Mail\EmailAddress:private] =>
)
)
[bccs:SendGrid\Mail\Personalization:private] =>
[subject:SendGrid\Mail\Personalization:private] =>
)
)
)
Obviously I used correct addresses in the tos and ccs sections.
Is something wrong with the sent object?

Answer 1

Apart from the code if there are any other problems in sending mail the send-grid library remains silent without throwing any exceptions and just returns the response 0. I would suggest you to
visit this link
In php-http-client\lib create a folder Exception.
Copy lib/Exception/InvalidRequest.php into the folder.
Modify lib/Client.php
These modifications are to throw appropriate exceptions which will help you to find what could be the problem in your case and be able to take it further.