I'm having problems while casting rays. How do I fix this?

When I try to cast a ray using this script, an error saying Unable to cast value to Objects keeps on coming up. Here's the code

local Rae1 = Ray.new(M8.Union.Position + Vector3.new(3,5 ,0), M8.Union.Position + Vector3.new(-3,5 ,0))
local hit, pos1 = game.Workspace:FindPartOnRayWithIgnoreList(Rae1, (Floor))

what am I doing wrong?