I have setup a test application which includes a URL in the form:
When I login it is coming up with the error "Illegal value for redirect_uri parameter" and the redirectUrl is showing as "http://server" only. I can find nowhere else that this value is stored, so what am I missing?
I suppose you are referring to an OpenID Connect-enabled application, am I wrong?
If so, you should make sure the redirect url in the General tab of your OpenID Connect app in Okta contains the exact the redirect_uri you're passing from your resource server (aka your custom app running on your server).