If when booking onto a face-to-face session you are faced with the error message "You are currently not assigned to a manager in the system. Please contact the site administrator.' Firstly check all of the users have manager emails on their profiles assigned. It is also important to check the box that sends the managers email confirmation is correctly checked.
Failing the above setup it may be necessary that you must create a user profile field manually that needs to be a "text input" type and have the shortname of "managersemail".
We have amended the template site to ensure this will not happen to newer users so is only likely to affect members who have sites created before August 2015.