You receive this error when your licenses.licx file contains entries you don't need. Only include the entries you need in the licenses.licx file.
Steps to Complete:
1. Open the licenses.licx file in that project
2. Remove the GrapeCity.ActiveReports.Viewer.Wpf.Viewer, GrapeCity.ActiveReports.Viewer.Wpf from the file
3. Rebuild/Run the application for the error to go away
Note: For a list of all the entries ( also known as required references) you may need for your licenses.licx file, please refer to this section in the link below: