QuickBooks Error code 6007 which is also named as QuickBooks Sync manager issue does not let you open the company file in the QuickBooks. 

Reasons:

•   Missing programs in the system.
•   Damaged company file.

Way to resolve the error code 6007:

Continue to login as admin in QuickBooks and install the latest release of QuickBooks and then reset the sync manager. 

For better assistance in fixing QuickBooks error code 6007, reach out to QBSsolved at +1(888) 910 1619.