Beginning with version 42, Google have disabled by default in Chrome a technology called NPAPI, something relied upon by Java to work with web browsers. This blocks the use of Java with Chrome.
If you use Chrome, this change will prevent you from using the Screen Recording function of MU Video as well as any Java-based web content added to D2L courses.
For now, Google have provided a temporary fix by way of a hidden Chrome configuration setting. For more information on that, please read on. As a long term solution, the creators of Java-based web tools, including the maker of MU Video's screen recorder, are re-engineering their tools to use other technologies.
The following is from Enabling Java in Chrome: