WARNING: Unable to resolve package source 'https://www.powershellgallery.com/api/v2'

This post describes how I resolved the following: WARNING: Unable to resolve package source 'https://www.powershellgallery.com/api/v2' Cause This warning can occur when trying to install a PowerShell module and Tls12 is not specified as the SecurityProtocol. You can check the SecurityProtocol by running this command in PowerShell: [Net.ServicePointManager]::SecurityProtocol Resolution To resolve this issue, I set the SecurityProtocol to Tls12 by running this command in PowerShell: [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 Source:  https://rnelson0.com/2018/05/17/powershell-in-a-post-tls1-1-world/ I was then able to install PowerShell modules successfully. Related Posts - PackageManagement\Install-Package : No match was found for the specified search criteria and module name -  Get-PSGalleryApiAvailability : PowerShell Gallery is currently unavailable. Please try again later.