What does "block markup not found" mean?

So, I finally updated my Halo 5 copy, and I went to the customization to change colors. When I switch to my colors, I get this message next to my armor selection. Does anybody know what it means?

Its a bug. They are working on it.

Yeah I saw it too but it didn’t do anything like not let me use my armor so they don’t have to fix it fast.