Remote server error- using remote API

Remote server error- using remote API

I am using Remote API to save the document on my local server. Suddenly, I am not able to do that. It was working fine for me till yesterday. In firebug, I can see the response as "<html><body>Server Error Occurred. Please try again later or please write to us at <a href='mailto:support

@zohowriter.com'>support@zohowriter.com</a></body></html>"?
I can share the code, if required?