I am no longer seeing today's lesson under my lesson dashboard.

This is most likely because you have registered twice under different emails, and you're currently logged in under the account where you didn't purchase any lessons. 

Another reason could be that you have yet to purchase or schedule lessons for today's or future sessions. To purchase more lessons, please click the basket icon on either the lesson card or the teacher card on the Teacher's screen. To schedule unscheduled lessons, please click the "Lessons" menu item in the dashboard and then click the "Unscheduled" tab to see if you have any unscheduled lessons which are yet to be scheduled.