According to Intuit, Error Code -6138, -82: “You do not have sufficient permissions to the specified folder ” is an error that has multiple possible causes related to network file permissions.
There are a number of troubleshooting steps to resolve this error that are discussed in detail in the Intuit knowledge base article linked below. Before proceeding to those steps, insure that all computers in your QuickBooks installation have been updated to the latest QuickBooks release. To verify the version and release of QuickBooks, press F2 while QuickBooks is running to display the Product Information window. The Product field shows the version and release at the top left of the window. In the example below, Premier Accountant Edition 2009 is the version and R3P is the release. Complete this step on each computer in your multiuser setup.
To follow the troubleshooting steps to resolve Error Code -6138, -82, consult this Intuit knowledge base article.