The error 3371 in QuickBooks Desktop (QBDT) is usually caused by the following:
Component or file (QBregistration.dat or MSXML component) needed to run the program is damaged or missing.
Outdated Windows operating system or an anti-virus program.
Opening or importing the Web Connect (.QBO) file without saving it first.
You'll have to run the 3371 Error Fix from the QuickBooks Tool Hub to resolve the issue and get back to business in no time. You can download and install the tool first if you haven't already. Let me guide you how.
I'm also adding this article to further guide you in managing your business using QBDT: Help Articles. It includes topics about banking, taxes, income, expenses, and reports to name a few.
Please know that you're welcome to comment below if you have other concerns or follow-up inquiries about opening your QBDT account and managing the growth of your business. I'm just around to help. Take care always.