You need to be on the Trusted List to edit the LNAB. The profile has only one Profile Manager, and she hasn't been active for a while.
I'd suggest sending a request to be added to the Trusted List
https://www.wikitree.com/index.php?title=Special:TrustedList&u=3339135
You may wish to send her a private message as well. And in the event she doesn't respond after a time, you may need to refer to Help:Unresponsive Profile Managers