title: How to solve IDX21323: RequireNonce is '[PII is hidden]'?
body: <p>I've got a WebApplication running on .NET 5 and using <code>OpenidConnect</code> authentication having ADFS 4 as the Identity Server.</p>
  <p>I'm getting the <code>IDX21323: RequireNonce is 'True'. OpenIdConnectProtocolValidationContext.Nonce was null, OpenIdConnectProtocol.ValidatedIdToken.Payload.Nonce was not null. The nonce cannot be validated. If you don't need to check the nonce, set OpenIdConnectProtocolValidator.RequireNonce to 'false'. Note if a 'nonce' is found it will be evaluated.</code> error in some browsers(tested Chrome,Edge,Opera), but <code>NOT</code> in <code>firefox</code>. In Firefox the authentication flow goes as expected.</p>
  <p>Any idea why this might be happening?</p>
  <p>My guess is that for some reason, all the tested browsers besides firefox, remove the <code>Nonce</code> cookie.</p>