Hi all ---- I just started upgrading Umbraco on our site from 7.6.1 to 7.11.1 through NuGet.

After pulling down the package, I've started getting failures when opening the Umbraco back end. I can login fine, yet the left menu won't load. I found the 500 error in Chrome developer tools, this is the cut-and-paste from there:

{Message: "An error has occurred.", ExceptionMessage: "One or more errors occurred.",…} ExceptionMessage : "One or more errors occurred." ExceptionType : "System.AggregateException" InnerException : {Message: "An error has occurred.",…} Message : "An error has occurred." StackTrace : " at System.Threading.Tasks.Task1.GetResultCore(Boolean waitCompletionNotification) ↵ at Umbraco.Web.Editors.SectionController.GetSections() ↵ at lambda_method(Closure , Object , Object[] ) ↵ at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters) ↵ at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary2 arguments, CancellationToken cancellationToken) ↵--- End of stack trace from previous location where exception was thrown --- ↵ at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() ↵ at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) ↵ at System.Web.Http.Controllers.ApiControllerActionInvoker.

I truncated the stack trace some to save space (I can add it all if someone wants). Going to https://localhost/umbraco/backoffice/UmbracoApi/Section/GetSections gives a 417 error.

I've also tried creating an new empty web, installing 7.6.1, upgrading to 7.11.1 and everything runs fine. That makes me thing I have something interfering in my code, yet I'm at a loss to find it.

Any help is greatly appreciated,

Drew