Hello Ken   Thanks for response.    Yes my browser is set to Edge.  Maybe this implementation loading problem is an issue ? Have You checked it out ?   As I wrote in my first post, We use Insert Gallery dialog to get Image Url and after I click image thumb on dialog i receive mention error.  

 Hello everyone   I have found strange  behavior when CuteEditor loads implementations. Below  screen is taken from fiddler :   as You can see it loads Gecko_Implementation instead of IE_Implementation. This happen in IE11.    Also I have discovered it happens also on page ...