QuickBooks Error 3371 – Learn Causes and Proven Fixes. QuickBooks Error 3371 occurs due to missing or damaged license files, affecting software access. The error is caused by system crashes, failed updates, or missing files. Symptoms include error messages and app crashes. Fix it by deleting the EntitlementDataStore.ecml file, repairing QuickBooks, and updating your operating system. Our guide provides a step-by-step solution to restore full functionality in no time. https://quickbooks-issue.hashnode.dev/learn-how-to-resolve-quickbooks-desktop-registration-issues