There has been a critical error while processing the form.

Issue Description

You get the below error message when you use InfoPath Forms on SharePoint 2010 and Internet Explorer 11.

Critical Error

There has been a critical error while processing the form.  

Click Start Over to load a new copy of the form. If this error persists, contact the support team for the Web site.

Click Close to exit this message.

Object doesn't support property or method 'addEventListener'

Fix

There is an incompatibility with some SharePoint 2010 features and Internet Explorer 11.

To fix this, IE needs to run on Enterprise Mode.

Open Internet Explorer -> Right Click Enable Menu bar -> Tools - > Select Enterprise Mode