Unable to invite people who like my business page to join my group

Hi all!

I've had a business page for a while and recently decided to create a group where people can discuss a topic based on my business. The issue is, I can't invite anyone that likes my page to join my group.
On my group, when I press the 'Invite' button which comes with the tagline "Invite people who like your Page to join this group", it comes up with the message "There aren't any fans to invite at this time.". However, I have nearly 1000 people that like my page?

Has anyone had this...

Unable to invite people who like my business page to join my group

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