Resolve QuickBooks Error 377 with Simple Troubleshooting Steps QuickBooks Error 377 can disrupt workflow by preventing access to company files. This error is mainly linked to a corrupted entitlement file that stores license information. Deleting this file allows QuickBooks to rebuild it automatically. Running QuickBooks as administrator and installing the latest updates ensures stability and reduces chances of encountering the same error again. ----- https://www.trysmallbiz.com/articles/instant-and-effective-trick-to-rectify-quickbooks-error-377