Surveillance UI lists 'HTTP Error 500.19 - Internal Server Error'

Problem

Accessing the Surveillance web UI in Enterprise Vault Compliance Accelerator (CA) Insight Surveillance results in the error below. There are no issues seen when accessing the EVBAAdmin website.

Error Message

HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid.
Error Code: 0x8007000d
Config File: \\?\C:\Program Files (x86)\Enterprise Vault Business Accelerator\Supervision Web\web.config

Cause

The error is caused by the ASP.NET Core V2 module not being installed on the server, which results in a failure of the handler listed in the \SupervisionWeb\web.config. This is likely to be seen on Server 2025, such as when moving or installing CA/Surveillance 15.x or higher to Server 2025.

Solution

The fix is to install the ASP.NET Core V2 module, as follows:

1. Install the ASP.NET Core Runtime 7.0.20 Hosting Bundle. The main page is https://dotnet.microsoft.com/en-us/download/dotnet/7.0. The direct link is https://dotnet.microsoft.com/en-us/download/dotnet/thank-you/runtime-aspnetcore-7.0.20-windows-hosting-bundle-installer.

2. Open the Internet Information Service (IIS) Manager console.

3. Click on the server node, then double-click on Modules in the Feature View.

4. Confirm the AspNetCoreModuleV2 module is listed.

5. Access the Surveillance web UI at https://<CA_Server>:81