Symptoms

Unable to see the content in Google Chrome browser when we use the content URL control in Smartforms
 

Diagnoses

Chrome should be set to allow the insecure content
 

Resolution 

It is an issue with chrome You can try this option to confirm the issue
It is possible to change the default behavior of Chrome to allow the insecure content -IFRAME- (Content Control-
but this is not a recomended configuration).

please do the following:
1. Go to Start menue then right click the chrome Icon
2. Select properties
3. look for the "Target" field then make the command line look like this:
"C:Program Files (x86)GoogleChromeApplicationchrome.exe" --allow-running-insecure-content

If you no longer want to allow insecure content in Chrome please erase "--allow-running-insecure-content".