EPiServer.Labs.ContentManager: 500 error when trying to go to edit mode

Hi,

installed EPiServer.Labs.ContentManager 1.0.2 in a CMS12 site and when i try to go to edit mode (/episerver) i get the following 500 error:

MissingMethodException: Method not found: 'Void EPiServer.Cms.Shell.Internal.CmsModuleViewModel..ctor(EPiServer.Shell.Modules.ShellModule, EPiServer.Framework.Web.Resources.IClientResourceService, System.Collections.Generic.IEnumerable`1<EPiServer.Shell.IContentRepositoryDescriptor>, EPiServer.Core.IContentLanguageAccessor)'.

EPiServer.Labs.ContentManager.ContentChildrenModuleViewModel..ctor(ShellModule shellModule, IClientResourceService clientResourceService, IEnumerable<IContentRepositoryDescriptor> contentRepositoryDescriptors, IContentLanguageAccessor contentLanguageAccessor)

EPiServer.Labs.ContentManager.ContentManagerModule.CreateViewModel(ModuleTable moduleTable, IClientResourceService clientResourceService)

Any ideas?