I recently upgraded from 7.18 to 7.7.7.

I have a very simple document type for Author no template. 2 text boxes, Name and email.

when i try to create a new Author, I'm getting the following error:

2018-01-04 13:31:18,960 [P182396/D11/T59] ERROR Umbraco.Web.Editors.ContentController - Unhandled controller exception occurred System.ArgumentException: Cannot save content with empty name. at Umbraco.Core.Services.ContentService.Save(IContent content, Boolean changeState, Int32 userId, Boolean raiseEvents) at Umbraco.Core.Services.ContentService.Umbraco.Core.Services.IContentServiceOperations.Save(IContent content, Int32 userId, Boolean raiseEvents) at Umbraco.Core.Services.ContentService.Save(IContent content, Int32 userId, Boolean raiseEvents) at uLoremsy.Web.UmbracoEvents.uLoremsy.SetPreValues(IContentService contentService, IContent document, IEnumerable1 propertiesXml) at uLoremsy.Web.UmbracoEvents.uLoremsy.ProcessTree(IContentService contentService, IContent document, XElement treeXml) at uLoremsy.Web.UmbracoEvents.uLoremsy.ContentService_Created(IContentService sender, NewEventArgs1 e) at Umbraco.Core.Events.TypedEventHandler2.Invoke(TSender sender, TEventArgs e) at Umbraco.Core.Events.EventDefinition2.RaiseEvent() at Umbraco.Core.Events.ScopeEventDispatcher.ScopeExitCompleted() at Umbraco.Core.Events.ScopeEventDispatcherBase.ScopeExit(Boolean completed) at Umbraco.Core.Scoping.Scope.<>cDisplayClass700.1() at Umbraco.Core.Scoping.Scope.TryFinally(Int32 index, Action[] actions) at Umbraco.Core.Scoping.Scope.TryFinally(Int32 index, Action[] actions) at Umbraco.Core.Scoping.Scope.RobustExit(Boolean completed, Boolean onException) at Umbraco.Core.Scoping.Scope.Dispose() at Umbraco.Core.Persistence.UnitOfWork.ScopeUnitOfWork.DisposeResources() at Umbraco.Core.DisposableObject.Dispose(Boolean disposing) at Umbraco.Core.DisposableObject.Dispose() at Umbraco.Core.Services.ContentService.CreateContent(String name, Int32 parentId, String contentTypeAlias, Int32 userId) at Umbraco.Web.Editors.ContentController.GetEmpty(String contentTypeAlias, Int32 parentId) at lambdamethod(Closure , Object , Object[] ) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>cDisplayClass10.9(Object instance, Object[] methodParameters) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 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.