There can be quite a few reasons behind Error 6177 in QuickBooks; one such reason behind the error is QuickBooks desktop does not use the path to open the company file, or any kind of Virus or malware in QuickBooks files can also cause this error. Incomplete installation or corrupted installation and system files mistakenly deleted that are related to QuickBooks can also cause the error. Another reason can be if the QuickBooks Database Server Manager is not installed on your system.
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A short guide you can see:- How to fix Windows Firewall Is Blocking QuickBooks and Resolve QuickBooks Form 941