I am getting this error often on the website and need some help troubleshooting....   There is no error in event log corresponding.   I am using URL Master.   Any suggestions?  Below is the full error.  THANKS!!!

Cannot register or retrieve components until ComponentFactory.Container is set

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.InvalidOperationException: Cannot register or retrieve components until ComponentFactory.Container is set

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 

[InvalidOperationException: Cannot register or retrieve components until ComponentFactory.Container is set]

  DotNetNuke.ComponentModel.ComponentFactory.VerifyContainer() +57

   DotNetNuke.ComponentModel.ComponentFactory.GetComponent() +12

   DotNetNuke.Common.Utilities.DataCache.GetCache(String CacheKey) +17

   DotNetNuke.Common.Utilities.DataCache.GetCache(String CacheKey) +11

   DotNetNuke.Entities.Host.Host.GetHostSettingsDictionary() +42

   DotNetNuke.Entities.Host.HostSettings.GetHostSetting(String key) +26

   iFinity.DNN.Modules.UrlMaster.UrlRewriteModule.System.Web.IHttpModule.Init(HttpApplication application) +146

   System.Web.HttpApplication.InitModulesCommon() +65

   System.Web.HttpApplication.InitModules() +43

   System.Web.HttpApplication.InitInternal(HttpContext context, HttpApplicationState state, MethodInfo[] handlers) +729

   System.Web.HttpApplicationFactory.GetNormalApplicationInstance(HttpContext context) +298

   System.Web.HttpApplicationFactory.GetApplicationInstance(HttpContext context) +107

   System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +289