Error after upgrading to 9.18.1

Hi,

I ran in the this error when upgrading a solution to the latest. 9.x. (9.18.1). I think I have seen it before sometimes but cant remember what the cause was. I upgraded my local environment and that went just fine. But in the staging enviroment. Boom....

Has anybody here ran into this? And perhaps know what the problem is? The solution is pretty simple. No integrations, no PIM och eCommerce.

[NullReferenceException: Object reference not set to an instance of an object.]
   Dynamicweb.Admin.Global.Application_Start(Object sender, EventArgs e) +58

[HttpException (0x80004005): Object reference not set to an instance of an object.]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +546
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +171
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +173
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +255
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +347

[HttpException (0x80004005): Object reference not set to an instance of an object.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +552
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +122
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +737

Regards / Aki

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Error after upgrading to 9.18.1

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