Did you try to privat mode on your browser?
Ya I have faced same issue few days back and I just uninstalled from my phone.![]()
Try another browser, private mode, change wifi, or try another account maybe yours is banned
You have been ban by instagram... Simply deactivate your account.. Then after 4hours re activate it.. Thia will over write it
Are you using Internet Explorer/Microsoft Edge when trying to sign in? I was having the same issue that you're having with these browsers, but I can sign in on Google Chrome fine.