Most of these problems can be fixed in a few minutes. Try these steps in order.
1. Update the app
An old version of the app can crash or not show new options. Check your version in App version, then update the app in the App Store or Google Play.
2. Close the app completely
Close the app and remove it from multitasking, then open it again. If the problem continues, log out and log back in.
3. Check your internet connection
A weak network can block loading. Try Wi-Fi or mobile data. Without a network, you can use your downloaded sessions with offline mode.
4. On a computer or in a browser
Refresh the page and clear the cache: Ctrl + F5 on Windows, Cmd + Shift + R on Mac. If the page stays blank, try another browser, such as Chrome or Safari.
5. During a session
At the end of a session, tap Finish session, then Save, before leaving the screen or tapping Back. Otherwise, the session is not saved.
Still having the problem?
Write to your professional or to a Hexpert (Menu, then Support: see Client - Application support). To help us help you quickly, include:
your account email;
your device (iPhone, Android, computer with the browser name);
the app version;
the program and session involved, if any;
what happens on the screen and when;
a screenshot or a short video (preferably MP4).