A major issue that prevents users from opening functions in QuickBooks is the quickbooks script error code 0. This error is usually caused by browser conflicts, incorrect script settings, or blocked content. It often occurs when QuickBooks relies on embedded web browsers that are not properly configured. Fixing the error involves enabling scripts, clearing browser data, and adjusting security settings. For a reliable and lasting fix, contact QuickBooks support at 1.866.409.5111.