Fix .NET 10 exception with empty arrays

Author: damienbod

server/appsettings.json

@@ -5,8 +5,7 @@
     "TenantId": "[Enter 'common', or 'organizations' or the Tenant Id ('Directory (tenant) ID' obtained from the Azure portal (Overview of the corresponding App Registration)), e.g. da41245a5-11b3-996c-00a8-4d99re19f292]",
     "ClientId": "[Enter the Client Id ('Application (client) ID' obtained from the Azure portal), e.g. ba74781c2-53c2-442a-97c2-3d60re42f403]",
     "ClientSecret": "[Copy the client secret added to the App Registration from the Azure portal]",
-    "ClientCertificates": [
-    ],
+    //"ClientCertificates": [], // Note: emtpy array can cause exceptions
     // the following is required to handle Continuous Access Evaluation challenges
     "ClientCapabilities": [ "cp1" ],
     "CallbackPath": "/signin-oidc"