You can face QuickBooks Multi-User Mode Not Working when the workstations try to launch a company file on server computer. Make sure to read the linked article here if you wish to fix this issue quickly. You can also contact the professional team of QuickBooks at 1.800.579.0391 if you want to resolve this problem quickly.
Souce : https://zumashare.com/2021/10/01/tips-to-precisely-fix-quickbooks-multi-user-mode-not-working/

If you are getting an error message “QuickBooks export to Excel not working,” this indicates either the Microsoft Office is corrupt, or you have not installed the updates of your QuickBooks application for a long time. However, you can quickly rectify the issue by following the instructions listed in the linked article. For more help related to the error, reach QuickBooks support at 1.800.579.0391.

source : https://wolfensteincenter.com/2021/11/03/quickbooks-export-to-excel-not-working-how-to-fix-this/

In recent times many QuickBooks users facing some errors while updating payroll to the next version. QuickBooks Error 15241 is one of the common errors that occurred while trying to download or update QuickBooks Payroll. If you are one of those facing that type of error follow our linked article to resolve it or call us at 1.800.579.0391 for instant help
source : https://cliqafriq.com/read-blog/126355

One error that restricts users from running or updating payroll is QuickBooks error PS036. This common error is a result of QuickBooks not verifying the payroll subscription. For more info on the error and its troubleshooting procedure, follow the article linked here. You can also reach QuickBooks support for help at 1.800.579.0391.
source : https://dandheroes.com/2021/10/27/how-to-quickly-eliminate-quickbooks-error-ps036/

QuickBooks Error 6000 77 has occurred when your QuickBooks file is stored at a different place. This error is nearly impossible to resolve when you do not have enough permission to make changes in QuickBooks files. The user must fix this error as soon as possible to avoid any severe cause or data loss. Follow our linked article to resolve that error, or call us at 1.800.579.0391 for instant help.

source : https://keyposting.com/the-easiest-way-to-remove-quickbooks-error-6000-77/