QuickBooks closed or access refused

• QuickBooks closed: open the company file in QuickBooks, or allow access when QuickBooks is not running (QuickBooks Edit > Preferences > Integrated Applications, tick Deskora and set it to run without QuickBooks).
• Access refused: in QuickBooks, as Admin, open Edit > Preferences > Integrated Applications > Company Preferences and allow Deskora.
• Single-user mode: switch the file back to multi-user mode (File > Switch to Multi-user Mode).

Still stuck? Open a ticket in Account > Support and paste the last lines of the newest file in the connector's log folder (right-click the icon > Open the log folder).