I have created a user register controller to register users with repository design pattern. My controller looks like this.
[Route(\"api/[controller]\")]
It happened to me in a new ASP.NET Core 2.1 service when debugging in localhost because I had in Startup.Configure:
app.UseHttpsRedirection();
I deactivated this setting when debugging locally:
if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } else { app.UseHttpsRedirection(); }