Unable to post Facebook page to groups

I’m unable to share my Facebook page link to some groups, I can post things to the groups and as long it doesn’t have that link in, everything is fine. Soon as I post my Facebook page link, I get a notification saying basically my post is spam. I’ve tried bit.ly etc but to no avail. My posts aren’t spam, I’m just trying to advertise a local business to a few local Facebook groups. Anyway to sort this out?

Thank you

Poster :