We have QuickBooks Online Plus. Our employees are having trouble signing in to view their paychecks. Error says "we cant get your info" "your employer isn't connected to QuickBooks Payroll. or, says "We weren't able to show your payroll info"

Also, we cannot find anywhere to send invite except by entering their email and checking the box underneath it. However, it never sends the invite? We have to send them the website separately. We have several employees signed up already but new employees cant seem to get signed up?