400 Bad Request GCP Load Balancer

Hi there,

I have an ASP.NET Core application behind a GCP load balancer. I found this thread that seemingly has my same problem, but unfortunately the fixes mentioned in it are not working for me.

I have added ForwardedHeaders in accordance with the Microsoft docs which state they must be implemented before UseHsts().

services.Configure<ForwardedHeadersOptions>(options => {
				options.ForwardedHeaders = ForwardedHeaders.XForwardedProto;


and the payload has the correct redirect_uri, so I’m really not sure what/where has gone wrong.

I do not see anything Okta related in your question, so probably hitting SO with your question maybe a better way to get an answer