Unable to cast object of type 'System.Windows.Forms.TabPage' to type 'StudioiIntegrationApiWebLookup.WebBrowserTabPage'.

Hi!  I'm getting this message: Unable to cast object of type 'System.Windows.Forms.TabPage' to type 'StudioiIntegrationApiWebLookup.WebBrowserTabPage' when I try to use Web  Lookup with Studio 2017 SR1 - 14.1.6413.8.  Please advise.  Thank you!