Hi Mandeep,
I tried looking at this and I’m not sure why Google news RSS feed is gave http error 503 (internal server error). This is something beyond plugin’s control. Not sure if Google is blacklisting your server.
Also, can you confirm if you have placed any PHP code to increase the RSS feed refresh/cache time? May be that frequency is prohibiting Google news to stop serving the RSS feed to your site?
What I have done now is created a proxy for google news RSS feed using feedburner. So the RSS feed URL would be https://feeds.feedburner.com/google/LF5KTaTKj6J
. Please let me know how it goes.
Thanks,
Aakash