It means that the account has either (temporarily or permanently) been disabled by Instagram or the owner. It’s also conceivable that they’ve changed their username, which implies you’ll need to figure out their new one in order to visit their profile.
Fix Instagram User Not Found Problem Solved
6 Ways to Know if Someone Blocked You on Instagram
The “User not found” error on Instagram indicates that the user has either changed their username, you have been blocked, their account has been deleted or disabled, or their account has been shut down.
If you can’t find a particular account, it’s possible that you’ve been blocked. If the user’s profile photo isn’t visible when you visit their page and the text “No Posts Yet” appears in the photo grid area, you have definitely been blocked.
If you’re getting the message “user not found,” make sure your username is correct. If another account holder blocks you, check to see whether your username is incorrect. If any of the aforementioned difficulties occurred after connecting to any other devices or accounts, one of them might be at fault.
It’s conceivable that the account has been terminated or deactivated, so check again in an incognito browser to ensure this isn’t the case. If you can view the profile, you may be sure you’ve been blocked. If not, it’s likely that the account has vanished.
Check for the number of posts on the person’s profile if you’ve been able to access their profile from previous comments or through direct messages. If there are a certain number of postings and ‘No Posts Yet’ appears in the Feed, it means they have blocked you. You’ll see all of their postings if you’re not blocked.