I am having the exact same issue.  Every time I attempt to sync QB Time with QB Desktop - I get a login error that I don't have permission, yet when I attempt to use QB Time with QB Desktop - it behaves correctly and lets me in.  I must be able to sync.  I have added new employees that have no access because I can't sync the files to allow QB Time to acknowledge them and offer the option to invite them to use the app.  Please help with a resolution.  Thank you.  Kim