When you have PigVision online the program can only import files if they are saved to your C: Drive.
When you open your RDP 
you must right-click and select “Edit” a new screen will appear like below:
Here you need to select “Local resources” and “More” – open the drop down menu under Drive and checkmark the box “C:”
Click “OK” and the program can now access the file and you can import it.