ASP.NET Core 2.2 Web API Angular. Hosting provider says 500 - Internal Server Error

I'm trying to publish an ASP.NET Core 2.2 Web API and Angular 8 project using SmarterASP.NET, a hosting provider that supports ASP.NET Core. However, I get the following error:

500 Internal Server Error. There is a problem with the resource you are looking for and cannot be displayed.

However, if I start the project locally it works perfectly.

I searched through the internet and various forums and saw this question , another question and this github post .

Here is my Mainmethod:

public class Program
{
    public static void Main(string[] args)
    {
        var host = CreateWebHostBuilder(args).Build();
        WebHost.CreateDefaultBuilder(args)
            .UseSetting(WebHostDefaults.DetailedErrorsKey, "true");

        host.Run();
    }
}

Here is my Configure()class StartUp:

public void Configure(IApplicationBuilder app, IHostingEnvironment env, 
    IServiceProvider provider)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseHsts();
    }       
    app.Use(async (context, next) =>
    {
        await next();
        if (context.Response.StatusCode == 404 && 
            !Path.HasExtension(context.Request.Path.Value))
        {
            context.Request.Path = "/index.html";
            await next();
        }
    });     
    app.ConfigureCustomExceptionMiddleware();
    app.UseCors("ApiCorsPolicy");
    app.UseDefaultFiles();
    app.UseStaticFiles();
    app.UseStaticFiles(new StaticFileOptions()
    {
        FileProvider = new PhysicalFileProvider(
            Path.Combine(Directory.GetCurrentDirectory(), @"StaticFiles")),
            RequestPath = new PathString("/StaticFiles")
    });
    app.UseHttpsRedirection();
    app.UseAuthentication();
    app.UseMvc();
    app.UseDeveloperExceptionPage();
}

Here is my web.configfile:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <location path="." inheritInChildApplications="false">
    <system.webServer>
      <httpErrors errorMode="Detailed" />
      <aspNetCore processPath="dotnet">
      <environmentVariables>
           <environmentVariable name="ASPNETCORE_DETAILEDERRORS" value="true" />
           </environmentVariables>
      </aspNetCore>
      <handlers>
        <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" 
            resourceType="Unspecified" />
      </handlers>
      <aspNetCore processPath="dotnet" arguments=".\fooappl.dll" stdoutLogEnabled="true" 
          stdoutLogFile=".\logs\stdout" hostingModel="InProcess" />
    </system.webServer>
  </location>
  <system.web>
    <customErrors mode="Off"/>
  </system.web>
</configuration>
<!--ProjectGuid: 25e0e882-c3ff-4f8d-98cc-f26a692fa019-->

I have created the folder logs\stdoutbut the log file is not created.

I'm kind of stuck. Can you say what am I doing wrong?