In floor heating system leak

Good morning , new member thanks for any assistance! This am we woke up to a leak in the manifold portion of our in floor heating system . It appears to be leaking along a plastic seam where the pressure valve portion meets the rest of the unit .. I can post a picture if that’s possible.
Any trouble shooting to address this?
Thanks

source https://hvac-talk.com/vbb/showthread.php?2226656-In-floor-heating-system-leak&goto=newpost