Please Help

I'm having trouble connecting Manychat to my Instagram account. I think I must have done something wrong, now whenever I click on my account to add to Manychat, the following response appears: "Your request has been sent. please ask owner of Manychat account with this page to approve your request”.

The thing is, no field for approval appears within Manychat. I have already created, deleted, and created a Manychat account again, but it persists. No problem with Facebook Page, just with Instagram.

Please help