Owin startup bug with Umbraco Cloud - netStandard reference missing - owin

Question

In our current Umbraco Cloud project, we are using the Hangfire library (1.6.17) - the lib has a OWIN dependency (1.0.0).
Here is the code to call the hangfire launch:
In our current project, we are using the Hangfire library (1.6.17) - the lib has a OWIN dependency (1.0.0).
Here is the code to call the hangfire launch:
using Microsoft.Owin;
using Owin;
using Umbraco.Web;
using Hangfire;
using Hangfire.Dashboard;
using Hangfire.Annotations;
using Umbraco.Core.Models;
using Umbraco.Core;
using System.Web;
[assembly: OwinStartup(typeof(XX.Web.Core.Startup))]
namespace XX.Web.Core
{
public class Startup : UmbracoDefaultOwinStartup
{
public override void Configuration(IAppBuilder app)
{
//ensure the default options are configured
base.Configuration(app);
var cs = Umbraco.Core.ApplicationContext.Current.DatabaseContext.ConnectionString;
GlobalConfiguration.Configuration.UseSqlServerStorage(cs);
app.UseHangfireDashboard("/umbraco/backoffice/hangfire", new DashboardOptions
{
Authorization = new[] { new UmbracoUserAuthorisedFilter() },
AppPath = "/Umbraco"
});
app.UseHangfireServer();
}
}
public class UmbracoUserAuthorisedFilter : IDashboardAuthorizationFilter
{
public bool Authorize([NotNull] DashboardContext context)
{
// In case you need an OWIN context, use the next line,
// `OwinContext` class is the part of the `Microsoft.Owin` package.
//var context = new OwinContext(owinEnvironment);
// Allow all authenticated users to see the Dashboard (potentially dangerous).
//return context.Authentication.User.Identity.IsAuthenticated;
//this if you want to lock down to admins only
var userService = ApplicationContext.Current.Services.UserService;
var user = userService.GetByUsername(HttpContext.Current.User.Identity.Name);
return user.IsAdmin();
//this if you just want to make sure user is logged into backoffice
//return UmbracoContext.Current.Security.CurrentUser != null;
}
}
}
This is the default hangfire startup code to be able to use the library. The code has been working fine on 2 local machines, one Azure Web App instance but when I push this code to the Umbraco Cloud branch I get the following error:
Could not load file or assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file specified.
The issue is: we are not using .net standard, both projects (web and core) are using .net framework 4.6.2
Is there any workaround for that issue ?