Marco at Dell Support found a work around solution
I just installed Windows 2016 and tried to install open essential but I can't install open essential due to below error message. -One or more mandatory prerequisites for Essential are pending. Installation cannot continue. Run the Pre-Requisite Check for details.  How do I resolve this problem to install the open essential?   I installed Windows update and installed prerequisites.  and I got two information when I install the Open essential essential but actually there is enough space over 200GB free size. - You will not be able to install Essentials in the volume where free disk space is less than 1GB. Please refer Essentials user guide for recommended hardware configuration.  - See Readme_essentials.txt for information on operating system updates and other pre-requisites for the proper functioning of Essentials. It is critical to apply these updates to the system. Click here to launch Essentials Release Notes
I can't install open essential on Windows 2016