1) Goto Your Business Facebook Account
2) Then Click on Setting and goto Pages
3) Add New Page and Click on Claim Page (if you are admin on page then you can claim page else not )
4) Paste Page Link and Click on Claim
5) When You Claim Page Successfully Then Check Admins if Hidden Admin is on Page Then the Hidden Admin is shown in Invitation.
6) Remove it and add Your own Hidden Admin.