Secure InSecure Warning when I click Compose from Top Bar in Zoho Personal

Secure InSecure Warning when I click Compose from Top Bar in Zoho Personal

Zoho Personal Team,
 
When I click on the 'Compose' link on the top application bar of Zoho Personal, I get a Secure Insecure Warning page as illustrated in the screenshot.
 
It looks like some image or a stylesheet is being requested from http(s) while the other requests are from a different channel.
 
--Deepak