After installation of SDL Tridion Sites 9 Content Manager, the GUI comes back with "HTTP Error 500.19 - Internal Server Error"
![umbraco 722 http error 50019 internal server error iis not iis express - Installing umbraco - our.umbraco.com umbraco 722 http error 50019 internal server error iis not iis express - Installing umbraco - our.umbraco.com](https://our.umbraco.com/media/upload/1807324d-31a1-4222-a158-0ba1e3cedfb7/IISError.jpg)
umbraco 722 http error 50019 internal server error iis not iis express - Installing umbraco - our.umbraco.com
![Http error 500.19 internal server error IIS | error on a web app in Internet Information Services - YouTube Http error 500.19 internal server error IIS | error on a web app in Internet Information Services - YouTube](https://i.ytimg.com/vi/O1z3IJTiC6g/maxresdefault.jpg)
Http error 500.19 internal server error IIS | error on a web app in Internet Information Services - YouTube
Cannot read configuration file due to insufficient permissions' occurs when getting HTTP Error 500.19 - Worry-Free Business Security
![CMon 19.8 installed with IIS shows 'HTTP Error 500.19 - Internal Server Error, and Error Code 0x80070021', on load in web browser – NovaBACKUP Support CMon 19.8 installed with IIS shows 'HTTP Error 500.19 - Internal Server Error, and Error Code 0x80070021', on load in web browser – NovaBACKUP Support](https://support.novabackup.com/hc/article_attachments/4419356639633/mceclip4.png)