Hi

Im upgrading from 7.6.3 -> 7.15.7

The site is working after the upgrade and backoffice is working But the tree menu is missing Im getting this error when trying to open the menu

System.MissingMethodException: Method not found: 'System.Collections.Generic.IEnumerable`1<System.String> Umbraco.Core.Models.Membership.IUser.get_DefaultPermissions()'.

In the log im getting this error

    ERROR Umbraco.Web.Trees.ContentTreeController - Unhandled controller exception occurred
System.MissingMethodException: Method not found: 'System.Collections.Generic.IEnumerable`1<System.String> Umbraco.Core.Models.Membership.IUser.get_DefaultPermissions()'.
   at Umbraco.Web.Trees.TreeControllerBase.OnMenuRendering(TreeControllerBase instance, MenuRenderingEventArgs e)
   at Umbraco.Web.Trees.TreeControllerBase.GetMenu(String id, FormDataCollection queryStrings)
   at lambda_method(Closure , Object , Object[] )
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass6_2.<GetExecutor>b__2(Object instance, Object[] methodParameters)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)