That error is caused by either a bad internet connection or a setting on your PC not allowing VideoScribe to connect and check your account. How to fix this is covered in our help pages are and here's a link to that article - VideoScribe won't open – error message 'Without an internet connection you can only log in with your last used details' appears. If you follow the steps there that should sort things out.
Also try ticking the 'Remember Me' box as this will allow you to log-in offline once you have made a connection while online once.
I can't access the videoScribe. When I try to enter the then show the massage "To use offline mode, you must log in online on this device.