QuickBooks Error 3371 Code 11118 typically occurs when the software fails to load the license data, often due to damaged or missing files. This error may prevent QuickBooks from opening, disrupting business operations. Causes include issues with the EntitlementDataStore.ecml file, outdated Windows OS, or missing MSXML components. To resolve this, update your system, recreate the damaged files, or reinstall QuickBooks. For expert help, dial 1.855.738.2784.