What dose Argument 1 missing or nil?

Idk what is wrong with this is was working fine than stoppted and said

Argument 1 missing or nil
01:56:16.781 - Stack Begin
01:56:16.781 - Script 'terrain=workspace.Terrain
cfram=CFrame.new(50,8,350)
size=Vector3.new(700,2,101)

terrain:FillBlock(cframe,size,Enum.Material.Water)', Line 5
01:56:16.782 - Stack End


here is my scrip

terrain=workspace.Terrain
cfram=CFrame.new(50,8,350)
size=Vector3.new(700,2,101)

terrain:FillBlock(cframe,size,Enum.Material.Water)

Seems like you forgot the 'e' in your first argument for "FillBlock" This code should work.

local Terrain = workspace.Terrain
local cframe = CFrame.new(50,8,350)
local size = Vector3.new(700,2,101)

Terrain:FillBlock(cframe,size,Enum.Material.Water)

Please accept it this helped.