I am using Grandnode 4.5 and it works perfectly with google chrome.  Any other browser ( IE , Firefox , edge )  - I get the following error message:

NullReferenceException: Object reference not set to an instance of an object.
Grand.Framework.Infrastructure.Extensions.ApplicationBuilderExtensions+<>c__DisplayClass1_0.<UseGrandExceptionHandler>b__1(HttpContext context) in ApplicationBuilderExtensions.cs
+
                        throw exception;
Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)


What is the issue here?

Additionally:  the errors above have now started appearing in chrome as well.

If I log in to the admin panel first and then go to the dashboard - after just doing that , there is no error on the store pages.

Strange! Any Ideas?  This is a pretty plain install. No plugins installed or anything

It's judging, because I don't have more details. Have you modified something in it? Or it's just fresh installation? It's on your local environment or it's hosting? It's logged user or guest?

It was a fresh installation .  I actually just blitzed everything and started again and it is working.  I did make some changes previously , I think to shipping settings but not many.