Execution policy blocked the replacement placeholders mechanism

When attempting to use the replace_placeholders.ps1 script with the command

.\replace_placeholders.ps1

you may encounter the following error.

.\replace_placeholders.ps1: 
File C:\Users\XXXX\Downloads\artifacts\replace_placeholders.ps1 cannot be loaded. 
The file C:\Users\XXXX\Downloads\artifacts\replace_placeholders.ps1 is not digitally signed. 
You cannot run this script on the current system. 
For more information about running scripts and setting execution policy, 
see about_Execution_Policies at https://go.microsoft.com/fwlink/?LinkID=135170.

Why? The reason is that the default PowerShell Execution Policy restricts the execution of unsigned scripts.

To execute the script, you need to temporarily change the Execution Policy to Unrestricted:

Before running the script, execute the following command:

Set-ExecutionPolicy -ExecutionPolicy ByPass -Scope Process

Set-ExecutionPolicy ByPass