Cannot validate sendgrid sending server


New Member
Hello guys,
I can't validate sendgrid as a sending server for a client of mine.
I am using API.
Mailwizz lattes version.
I have enabled debugging mode and this is the error I get:

Fatal error: Class '\Guzzle\Http\Client' not found in /home/sitename/ on line 294

Any idea what's going on?
That should work just fine. Please open a support ticket and send me backend url and login to your app but also a FTP login to see what is going on.