Script files that are compressed by using the GZIP compression method do not work in Internet Explorer 11.
To resolve this problem, install the most recent cumulative security update for Internet Explorer. To do this, go to Microsoft Update. Additionally, see the technical information about the most recent cumulative security update for Internet Explorer.
Note This update was first included in security update MS14-056: Cumulative security update for Internet Explorer: October 14, 2014.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
See the terminology that Microsoft uses to describe software updates.