Run PowerShell from Azure DevOps - sharepoint

Question

I have a task: to install solution (wsp) on remote machine using Azure DevOps Pipelines.
I have folder with *.wsp. And I have a PS-script. If I do it manually on this machine it works fine. No errors.
But when I use Azure DevOps I have a message:
Add-PSSnapin : No snap-ins have been registered for Windows PowerShell version 5.
At C:\Windows\SysWOW64\WindowsPowerShell\v1.0\profile.ps1:1 char:1
+ Add-PSSnapin "Microsoft.SharePoint.Powershell"
At the very beginning of my PS script I have this:
Add-PSSnapin "Microsoft.SharePoint.Powershell"
I need it, because I use Uninstall-SPSolution, Remove-SPSolution, Add-SPSolution and Install-SPSolution cmdlets inside script.
I've tried to add
Add-PSSnapin "Microsoft.SharePoint.Powershell"
to "profile.ps1", I've tried to run powershell inside powershell. Again and again error is the same. I don't understand how to fix it.
https://i.stack.imgur.com/UNM7R.png
https://i.stack.imgur.com/NTiWs.png
https://i.stack.imgur.com/sA6tU.png
https://i.stack.imgur.com/bK9kq.png

Answer 1

Try preceding your command with Get-PSSnapIn:
if (Get-PSSnapin "Microsoft.SharePoint.Powershell") {
Add-PSSnapin "Microsoft.SharePoint.Powershell"
}

Answer 2

Add-PSSnapin : No snap-ins have been registered for Windows PowerShell version 5.
At C:\Windows\SysWOW64\WindowsPowerShell\v1.0\profile.ps1:1 char:1
Based on the error message, when the powershell execute the ps file, it get the error.
In Auzre Devops Powershell task, it will use the powershell.exe from C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe.
The exe path you use to execute the powershell file is different from the default.
You could run the following command in azure devops:
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe Get-PSSnapin -Registered
and
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe Get-PSSnapin -Registered
You can check if the Microsoft.SharePoint.Powershell exists.
Then you could use the correct powershell.exe path to execute the ps file.
For example:
C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe "path/xx.ps"