QuickBooks Error 3371 is a very common error that the user of QuickBooks software faces on a day to day basis. The reason behind such error may be the damaged and corrupt files installed in the QuickBooks software and thus QuickBooks is not able to load the license data properly. To fix the issue, download the QuickBooks Tool Hub driver and then run and install it on the system. Open the software installed and then open the files you were not able to open in the QuickBooks software earlier. You will see that the problem is gone. If the problem persists further, contact with the QuickBooks support and help team for expert and professional help in the subject matter.