Based on the error message, it cannot find the file on the said folder. Could also indicate permission/access issue on the folder. Did you create the folder “C:\UVA…\” where the simulation file is currently saved?
Try to run the example from the Application Gallery > Parameter sweep utility – Ansys Optics. Save the simulation file into your User’s directory i.e. Documents, Desktop, Downloads or create a new folder in Drive “C:\” to ensure read/write access on the folder.