“There was an error while performing this operation”

Question

I have a website in IIS for which I cannot open any of the settings like Authentication, Handler Mappings, Authorization Rules etc. It just shows the error message \"There was a

Answer 1

I had this issue as well. Trying to run ASP.Net Core on IIS 10. All I needed to do was this:

Screen shot taken from: https://docs.microsoft.com/en-us/aspnet/core/host-and-deploy/iis/development-time-iis-support?view=aspnetcore-2.1

Answer 2

Similar to the marked solution here, I had the same problem and again it was a missing IIS module, but this time it was the Application Initialization Module that was required, not URLRewrite. installing via the Web Platform Installer or IIS.net. fixed the problem.

Steps I took to debug this though was to section by section go through my web config removing each section and attempting to load the site and/or let IIS parse the config. When I removed the section pertaining to initialization optimisation this fixed the issue and I immediately remembered that this dependency was added a fair while ago.

Echo the sentiments though that this really needs better error messages!!!

Answer 3

I am running IIS 8.5 and I deployed my first Asp.Net Core 2.0 (Razor pages) site to the IIS Server (on Windows Server 2012 R2) that was running several Asp.Net Framework/Classic websites. This worked for me:

Install the .NET Core Windows Server Hosting bundle

https://docs.microsoft.com/en-us/aspnet/core/publishing/iis?tabs=aspnetcore2x#install-the-net-core-windows-server-hosting-bundle

Answer 4

My issue was that I installed the .NET Core Hosting Bundle before I installed IIS. Re-running the Hosting Bundle installer with Repar fixed it for me.

https://docs.microsoft.com/en-us/aspnet/core/host-and-deploy/iis/?view=aspnetcore-3.1#install-the-net-core-hosting-bundle

If the Hosting Bundle is installed before IIS, the bundle installation must be repaired. Run the Hosting Bundle installer again after installing IIS.

Answer 5

Same error message, but my C:\ had run out of disk space.