Motion Dismissed as it fails to state a claim

[u/ShotRodner]

My ex filed a motion through FOC for change in child support. My understanding is he lost his job and requested his child support obligation be brought to zero. Im at a good point in my life financially (and we generally get along) and I agreed to his motion.

Today I received a letter stating "The motion is dismissed as it fails to state a claim upon which relief can be granted". I dont quite understand the legal jargon or what this all means. I have no intention of helping him with this matter but Im just curious what this letter means. Any help would be greatly appreciated!

We live in Michigan.