ASP.NET Core MVC causes 500 error on IIS 8.5

Using .NET Core 3.1, I developed an MVC application and deployed it on IIS 8.5.

Using a browser, I can go to the home page when I visit, domain.com/myApp/but I get an http 500 error when I visit domain.com/myApp. This is working locally. The problem occurs on deployed servers.

This is my route in Startup.cs

app.UseEndpoints(endpoints =>
{
    // localization
    endpoints.MapControllerRoute(
        name: "LocalizedDefault",
        pattern: "{language:language}/{controller}/{action}/{id?}");

        endpoints.MapControllerRoute(
        name: "default",
        pattern: "{*catchall}",
        defaults: new { controller = "Home", action = "RedirectToDefaultCulture", language = "en" });
        });

I inserted some log statements in the RedirectToDefaultCultureaction method . Doesn't seem to hit home controller when there is no / at the end of the URL

I have developer exceptions enabled but it doesn't show me the error

I also tried providing default values LocalizedDefault​​for routes with no luck .

I successfully loaded the home page domain.com/myApp/Index(without the forward slash at the end)

Shouldn't the default endpoint capture the route?