You are not allowed to view this ticket. <– what my users see.

I’m running a WordPress site with Woocommerce, ActiveCampaign and Memberium. It’s a membership site. We have been running the support ticket system with great success until recently. My users are now seeing “You are not allowed to view this ticket.” As an administrator I’m not seeing this. I’ve checked through systems to see if I could find what would cause this – hoping it’s something quick and easy. Anyone recognize this issue and have a fix?