Error Occurred In Deployment Step ‘Recycle IIS Application Pool’ – Invalid Namespace SharePoint

One of the common deployment errors is Error Occurred In Deployment Step ‘Recycle IIS Application Pool’ – Invalid Namespace SharePoint. It occurs if the developers are trying to deploy SharePoint solution to SharePoint 2019 on premises.

The solution: you need to install IIS 6 management backward compatibility.

The steps (windows server):

1. serer manager
2. Click on “Add Roles and Feature”
3. Click next in the appeared dialog until you reach “Server Roles”.
4. expand “Web Server (IIS)” and then expand “Management Tools”
5. from  “IIS 6 Management Compatibility” select “IIS 6 WMI Compatibility”, “IIS 6 Metabase Compatibility” & “IIS 6 Management Console” and click Next.
6. Click install