Once you grant us access to your profile, Instagram gives us your "token" or "Instagram ID access" which allows us to calculate your data. 

Sometimes this token expires for no specific reason, which logs you out from Instagram.
When you're logged out, you need to re-authenticate your account so we can continue to calculate your data. 

You will find more information over here: 


To re-authenticate, you need to:

- go on this page: https://pro.iconosquare.com/user/ighandles

- click on "reactivate account"

- enter your Instagram username and password