"Problem Detected" when trying to send messages.

I’m not sure any of my Spartan Company requests or messages are gettting through on Halo Waypoint as I keep getting a “Problem Detected” message after sending them. Any ideas on what the issue could be?

Thank you in advance.

It’s been like this for a while now. Notifications don’t appear to work also. Apparently it’s not 343’s doing and it’s being ‘worked on’… Surprised it’s still not fixed.

It’s a known issue with external partners, still being worked on. Related to this problem
https://www.halowaypoint.com/en-us/forums/8f4648981f554a9d86527a5754966e89/topics/why-not-getting-notifications/f7418fab-ef9f-4eaa-ace5-9ef314047c39/posts