Config Error: This configuration section cannot be used at this path

Question

I\'ve encountered an error deploying a site to a server. When trying to load the home page, or access authentication on the new site in IIS, I get the error:

Answer 1

In my case, it was something else.

When I loaded the solution in a new version of Visual Studio, VS apparently created a new project-specific applicationhost.config file:

MySolutionDir\.vs\config\applicationhost.config

It started using the settings from the new config, instead of my already customized global IIS Express settings. (\Users\%USER%\Documents\IISExpress\config\applicationhost.config)

In my case this was the setting that needed to be set. Of course it could be something else for you: