When QuickBooks Error 6010 occurs, it means your QuickBooks installation may have been modified and checked out to re-install this application and begin again. This error indicates that QuickBooks isn't permitted to access the network thanks to anti-virus software or firewall.
Solution: Restart QuickBooks Database Server Manager
Reopen the QuickBooks Database Server Manager then scan the company file again.
From the beginning option and click on All Programs.
Now open QuickBooks and click on QB Database Server Manager.
Then choose the Scan Folders
If folders aren't present then click on Add Folder.
Now, Scan the files and check to open the files again.
In the last login to your company file.
Solution: Reinstall QuickBooks
Click on Start
Choose the control panel
Then click on Uninstall a Program.
Next, click on QuickBooks and uninstall the software.
Download and run QuickBooks Clean Install Tool.
Now, choose the QB version you would like to put in then click on Continue.
Click on Ok and install QuickBooks.
Finally, open QuickBooks again.
After following all the above steps still if you're facing any issue you'll contact the QuickBooks support team: +1-855-922-7243