The requested page cannot be accessed because the related configuration data for the page is invalid

Debugging a Web program using IIS Express during development, when you open a Web site with a problem, displays the following page. The cause of this problem is that there is a problem with the configuration of the access rights in the Web. config for the site and IIS Express itself application.host. Now to do is, according to the prompt, find the configuration to find the conflict, here is the configuration of authentication, this configuration in \my Documents\iisexpress\config, the specific path may change, However, the configuration files will be installed in my Documents during the general installation.

Follow the page prompts, the conflicting configuration changes, the site access will be no problem.

Take this as an example, this is because of access violation, so get rid of it.

The requested page cannot be accessed because the related configuration data for the page is invalid