I can confirm, in firefox, disabling security (for now) loads the pages just fine.
Not so easy in Chrome, you basically have to start it with a command-line parameter to allow mixed  content. 
But obviously this is just a temporary  fix that may compromise security/privacy and it needs to be sorted at the server end...
Blocked loading mixed active content “http://cdn1.kongregate.com/javascripts/kongregate_api.js” 
					 
				
			
			
			
		 
		
		
		
			
			
				Last edited: Feb 28, 2019