Ammo module is not working in TBCC ("No ammo attached"), because the client version check in shared.lua only passes for Classic and Classic SoM (which are v1 clients).
To fix this, the lines

		if ns.client_version<2 then
			if info.ammo then
				ammo[info.sharedSlot] = true;
				hasChanged.ammo = true;
			end
			-- souls?
		end

should be

		if ns.client_version<4 then
			if info.ammo then
				ammo[info.sharedSlot] = true;
				hasChanged.ammo = true;
			end
			-- souls?
		end

For TBCC less than 3 would suffice, but with the WotLKC release it would break again. That's why I suggest to check it for less than 4.
Ammo was removed in Cataclysm, so the version check can stay at <4 forever. V4.x client would be Cataclysm Classic (if that would be released in the future).

Thank you for reporting. Update coming soon.