Build another materials stockpile and see what happens. 

Just bump up the material limit to 100k.  Banished counts a bunch of different resources as materials so it's not very useful as a limit with a mod like CC.

I've raised the material limit to 4000, it's still a small village so I know there is nowhere near that number of materials in stockpiles, is this just a bug in the mod?

[CC] In Colonial Charter, my brick furnace refuses to churn out any bricks because it says the material limit has been reached.