Hello. I am on 4.9.1 and expierienced the error below which brought down the site. After recycling the server below, I can no longer log in as host or admin. I tried logging on as a random user with a fake password, and the authentication works - I got an incorrect login message, but when I try logging in as the host or admin, it simply goes back to the homepage - no error messages.  I want to nip this in the bud before my client becomes aware of the issue.  Thanks for any suggestions.

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
AspDotNetStorefrontDNNComponents.AspdnsfPortalSettings.get_ro_StoreRootPath() +23
AspDotNetStorefrontDNNComponents.AspdnsfPortalSettings..cctor() +14

[TypeInitializationException: The type initializer for 'AspDotNetStorefrontDNNComponents.AspdnsfPortalSettings' threw an exception.]
AspDotNetStorefront.HttpModules.InitializerModule.HandleAuthenticateRequest(Object sender, EventArgs e) +92
System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +68
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75