There could be a few reasons why you're unable to unblock someone on Instagram. Here are some possible explanations: Technical issue: Sometimes, there may be temporary technical glitches that prevent you from unblocking someone on Instagram. In this case, you can try restarting the app or your device and attempting to unblock the account again. You're not logged in: You need to be logged in to your Instagram account to unblock someone. If you're having trouble unblocking an account, make sure you're logged in to your account. The account is already unblocked: If the person you're trying to unblock is already unblocked, you won't be able to unblock them again. You can check your list of blocked accounts in the "Blocked Accounts" section of your Privacy settings to see if the account is still listed there. Instagram has temporarily blocked your action: If you've unblocked and blocked someone repeatedly, Instagram might block you from unblocking them again. In this case, you'll need to wait for a few hours before attempting to unblock the account again. If none of these solutions work, you can try contacting Instagram's support team for further assistance.