Internet Explorer issue: No constructor found for widget ClickableContainer

Hi all, I deployed a new version of our app yesterday and since than users who are using the Internet Explorer (11) are facing an “issue” with the ClickableContainer widget. A red error text appears with : “No found for widget ClickableContainer.widget”  I didn’t change anything on the widget and it worked before. So I am confused why this error appears. I tried to deleting the Browser Cache of the users, but it didn’t help. With other browsers everything is working fine.  Anyone having an idea how to fix this?    
1 answers

So what DID change in this release? I've had widgets break since updating the Pushnotifications widget, since that widget contains a line of code that will break other widgets in IE.