Looking for a Facebook Expert to Fix my Business Page

When my business page posts in a group, I can see that a set amount of people have liked that post. However, when I click to see who has liked the post (and invite them to my business page), on mobile it just says '0' and will not show me anything.

On desktop, it says 'Sorry, this content isn't available at the moment. The link you followed may have expired, or the Page may only be visible to an audience that you aren't in'.

I've tried on a few different groups and tried with another admin, but no luck..

Ideally I need someone who has experienced a similar issue who can walk me through how to fix it..