Hi!  I'm a newbie. Just started Trailhead training again. in Accounts and Contacts, Nothing is clickable.  Instructions say :If you don't see the Accounts tab, check the upper right-hand corner and make sure you've selected the Sales app from the app picker. I don't see the accounts tab, or the App Picker. There's no response to anything I try in this trailhead. Pls advise! Thank you, Robin