We only support to link the ads to the Facebook page of your office or your agency, not your personal Facebook page.
Alternatively, you can share the ads to your personal Facebook page. In order to share the ads to your Facebook page, you need to click on "Share" button of the ad.
Or you can copy the Facebook ad link and paste it on the post that you want to create. Then remove the link after the ad preview has loaded and add a message to your post.