Visual Studio 2015 Script Error starting debugger

Question

When I start debugging a web application (MVC or Webforms doesn’t matter), I get a bunch of Script tooltips.

Line: 1087
Char: 13
Error: It is not possible to get the "addEventListener" property from an undefined or null reference.
Code: 0

URL: File: //.../Microsoft Visual Studio 14.0 / Common7 / IDE / CommonExtensions / Platform / CPUSampling / WebViews / Scripts / DiagnosticsHub.js

I also get the same error for the URL "File: //../WebViews/CpuView.html"

I tried while troubleshooting:

• Edited an instance of VS 2015
• The debugger started without the Diagnostic Tools window.

Any ideas on how to solve this problem would be appreciated!