Sitecore 8 Content Editor error

Question

Hey I'm getting this error below, I have tried the solutions here but can seem to fix it. Can someone point me in the right direction.

Any help would be most appreciated!

[NullReferenceException: Object reference not set to an instance of an object.]
Sitecore.PathAnalyzer.Extensions.ItemExtensions.InheritsFromTemplate(Item item, ID templateId, Boolean recursive) +71
   Sitecore.PathAnalyzer.Client.Pipelines.GetContentEditorWarnings.TreeDefinitionDeployment.Process(GetContentEditorWarningsArgs args) +68
   (Object , Object[] ) +79
   Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args) +364
   Sitecore.Shell.Applications.ContentManager.Editor.GetWarnings(Boolean hasSections) +270
   Sitecore.Shell.Applications.ContentManager.Editor.Render(RenderContentEditorArgs args, Control parent) +177
   Sitecore.Shell.Applications.ContentManager.ContentEditorForm.RenderEditor(Item item, Item root, Control parent, Boolean showEditor) +230
   Sitecore.Shell.Applications.ContentManager.ContentEditorForm.UpdateEditor(Item folder, Item root, Boolean showEditor) +366
   Sitecore.Shell.Applications.ContentManager.ContentEditorForm.Update() +406
   Sitecore.Shell.Applications.ContentManager.ContentEditorForm.OnPreRendered(EventArgs e) +211

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) +0
   System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) +76
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +211
   System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) +35
   Sitecore.Reflection.ReflectionUtil.CallMethod(Type type, Object obj, String methodName, Boolean includeNonPublic, Boolean includeInherited, Object[] parameters) +37
   Sitecore.Reflection.ReflectionUtil.CallMethod(Object obj, String methodName, Boolean includeNonPublic, Boolean includeInherited, Object[] parameters) +66
   Sitecore.Shell.Applications.ContentManager.ContentEditorPage.OnPreRender(EventArgs e) +117
   System.Web.UI.Control.PreRenderRecursiveInternal() +113
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4297