Why do I have to log in again every time I open the E2N Perso app?

How do you avoid having to log in again every time you open the E2N Perso app on your Android?

An incorrect cookie is probably responsible here. With the following steps you can clear the cache of the app and thus remove the cookies.

1. Exit the app completely (also swipe away via the "current apps").
2. Go to > Settings > Apps and select the E2N Perso app.
3. Delete the cache and data under "Memory".
4. Open the E2N Perso app and log in again.