How to resolve the error 'The request was aborted: Could not create ssl/tls secure channel' during backup agent installation

Introduction

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

System.Net.WebException: The remote server returned an error: (403) Forbidden.

System.Net.WebException: The request was aborted: Could not create ssl/tls secure channel

Resolution

The error mentioned above is the result of Microsoft Visual C++ Redistributable missing from the system. Microsoft Visual C++ Redistributable must be installed on the machine in question in order to run backups. 

To resolve the error, download and install Microsoft Visual C++ Redistributable for Visual Studio from Microsoft's website:
The latest supported Visual C++ downloads

The version (x86 or x64) of this package should be the same as the backup agent. For example, if you installed the x64 version of the backup agent, then install the x64 version of the Microsoft Visual C++ Redistributable.

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