Because the "challenge required" error is actually a login identity verification process, you already have an idea of what might be causing it. One is an internal problem, such as when Instagram is not connecting to its servers properly and is unable to verify your identity. The "challenge_required" error on Instagram means that your IP address is temporarily blocked. As a result, you won't be able to use certain features on Instagram like logging in, liking posts, or following others. 449wNlb.