The other solution, if you can’t get Instagram to work but need to access it on your mobile device, is to visit Instagram via your mobile browser. Since Instagram does have a web version, you only need to visit Instagram.com on your mobile browser (e.g. Safari, Chrome) and log in with your account credentials.
https://www.player.one/instagram-not-working-how-fix-app-crash-or-not-opening-547418