How to resolve the error 'Element not found' during backup agent installation

How to resolve the error 'Element not found' during backup agent installation

Introduction

An installation of the IBDR (Infrascale Backup & Disaster Recovery) backup agent may fail with the following error message:

One or more issues caused the setup to fail. Please fix the issues and then retry setup. For more information see the log file.
Element not found.

Resolution

The error mentioned above is the result of Microsoft.NET Framework missing from the system. Microsoft.NET Framework 4.6.2 must be installed on the machine in question in order to install the backup agent. 

You can find a full list of prerequisites on the following page:
Install the Disaster Recovery backup agent for Windows :: Infrascale Documentation Portal

To resolve this error, download and install Microsoft.NET Framework 4.6.2 from Microsoft's website:
Download Microsoft .NET Framework 4.6.2