It is compulsory from Intuit that the license information will get stored in your hard drive. So in case that information get damaged or missing, you can face this QuickBooks error 3371 code.
This can also occur during the process of cloning the data on the c:/ drive to another new hard drive. In these case, you have to delete your entitlement file. Also, you need to re-enter your license information to get this problem resolved.