Http Error 500 19 Aspnetcore Hosting Bundle

If you encounter HTTP Error 500.19 – Internal Server Error when opening the Quay site or an app under it in IIS, the ASP.NET Core Runtime Hosting Bundle is l...

If you encounter HTTP Error 500.19 – Internal Server Error when opening the Quay site or an app under it in IIS, the ASP.NET Core Runtime Hosting Bundle is likely missing.

What this means

• IIS can’t load the ASP.NET Core Module (ANCM) that hosts .NET apps unless the Hosting Bundle is installed.
• Without it, sites can fail at startup with 500.19.

Required installation (one-time per server)

• Install the ASP.NET Core Runtime Hosting Bundle (x64) for your .NET runtime version.
• Example (9.0.x): https://dotnet.microsoft.com/en-us/download/dotnet/thank-you/runtime-aspnetcore-9.0.10-windows-hosting-bundle-installer

Steps

1. Close IIS Manager if it’s open.
2. Download the Hosting Bundle (x64) from the Microsoft .NET site.
3. Run the installer as Administrator and accept defaults.
4. After install, restart IIS:
   • Open an elevated PowerShell or Command Prompt and run: iisreset
5. Refresh the site in your browser.

Verify

• The site should now start without 500.19.
• Optional: check Control Panel > Programs and Features for “Microsoft ASP.NET Core X.Y Runtime” and “ASP.NET Core Module”.

Notes

• Architecture: choose x64 for 64-bit servers.
• Version: use the Hosting Bundle version that matches the app’s target runtime. The link above is an example for .NET 9.0.10.
• Updates: keep the runtime current with Windows Update or periodic manual updates.

Troubleshooting if it still fails

• Review Windows Event Viewer > Windows Logs > Application for ASP.NET Core Module errors.
• Confirm required IIS features are installed (see “IIS Features” in this section).
• Ensure no group policy or antivirus blocked the installation.