Have you recently tried to log in, but are receiving an error called 2.SESSION.6? Don't worry, this is a known issue we are working on. In the meantime, these steps should help you get past it:
2) If you're using an Android device, please clear your cache. Here's how: https://www.androidcentral.com/how-and-when-clear-app-cache-or-data-android
4) Click 'Security'
5) Scroll Down to 'Third-party apps with account access'. Click 'Manage third-party access'
6) Click on 'Skullgirls'. Then click on 'Remove Access'
7) Press 'OKAY'
8) Install Skullgirls Mobile.