It seems like a platform-specific issue when deploying your API. Here’s a quick checklist to resolve it:

1.Application Pool Settings: Ensure the correct .NET version is configured in IIS and the pool identity has proper permissions.

2.Dependencies: Double-check for missing runtime or native dependencies using tools like Dependency Walker or ProcMon.

3)Publishing: Make sure you’ve published correctly (e.g., self-contained deployment if needed) and that the server runtime matches your app.

4.Permissions: Verify IIS_IUSRS or the app pool identity has read/write access to the necessary folders.

5.Event Viewer: Check for logged errors for more details idk.

or its a Web.config... confirm proper configuration, especially for processPath and runtime settings.