As of 6/19/19, it is NOT fixed! I couldn't add any employees as time tracking users, so I contacted QB support on 6/11/19; Nick reported the issue and gave me a case number and said I would be contacted in a day. I received NO RESPONSE as of today, 6/19/19. I thought the issue was fixed yesterday, as I was able to add 2 employees as time tracking users; however, when I tried to add the the next employee, I received the same error as before (the same as other users).  It's not a cache or browser issue. My client's Master Administrator tried to add the time tracking user from his computer in another city with the same error.