If you've tried logging out and still receive the same message, try clearing your cache. Your cache could be corrupted. You can also try restarting your internet router to fix this problem. After doing this, re-open the app and try logging in again. After that, try to clear your data and force stop the application. If you can't find the Instagram login screen, you'll need to change your password.

For more read - https://webfrenz.com/instagram-com-login/