This is intentional. They don't want you to be able to do this, so they make pages unusable. I tried to delink Facebook and Instagram recently. They make you

This is intentional. They don't want you to be able to do this, so they make pages unusable. I tried to delink Facebook and Instagram recently. They make you re-sign into FB via Insta... and it refused to sign me in (I was 100% using the correct password and tried many times). The sign-in just kept failing, until I was like "This is intentional, and Facebook will not let me de-link the apps." and gave up. Really time for the FTC and DOJ to take Facebook all the way to trial for this sort of stuff. No more settlements!