Type function instance refine<CharacterSetup, ~*blocked-1072443*> is uninhabited

[kvirulent]

Hello,

Today I encountered some very peculiar type errors in roblox studio. I am not sure what's going on, but before I submit an issue I wanted to come here for a sanity check. I've got a simple table with some methods:

local CharacterSetup = {}

function CharacterSetup:SetActive(Controller: ControllerBase, HumanoidState: Enum.HumanoidStateType)
	CharacterSetup.ControllerManager.ActiveController = Controller
	CharacterSetup.Humanoid:ChangeState(HumanoidState)
end

function CharacterSetup:CheckRunningState()
	local ControllerManager = CharacterSetup.ControllerManager
	local Humanoid = CharacterSetup.Humanoid
	return ControllerManager.GroundSensor.SensedPart ~= nil
		and not (CharacterSetup:isControllerActive(ControllerManager.GroundController))
		and Humanoid:GetState() ~= Enum.HumanoidStateType.Jumping
end

function CharacterSetup:CheckFreefallState()
	local ControllerManager = CharacterSetup.ControllerManager
	local Humanoid = CharacterSetup.Humanoid
	local BuoyancySensor: BuoyancySensor = Humanoid.RootPart:FindFirstChild("BuoyancySensor")
	return Humanoid:GetState() == Enum.HumanoidStateType.Jumping
		or (ControllerManager.GroundSensor.SensedPart == nil
		and ControllerManager.ClimbSensor.SensedPart == nil
		and not (CharacterSetup:isControllerActive(ControllerManager.AirController)
			or BuoyancySensor.TouchingSurface))
end

Nothing super complex! Just some methods, but here I am getting some very weird type errors:

96	function CharacterSetup:UpdateState()
97		local Humanoid = CharacterSetup.Humanoid
98		local ControllerManager = CharacterSetup.ControllerManager
99		
100		if CharacterSetup:CheckSwimmingState() then
101			CharacterSetup:SetActive(ControllerManager.SwimController, Enum.HumanoidStateType.Swimming)
102		elseif CharacterSetup:CheckClimbingState() then
103			CharacterSetup:SetActive(ControllerManager.ClimbController, Enum.HumanoidStateType.Climbing)
104		elseif CharacterSetup:CheckRunningState() then
105			CharacterSetup:SetActive(ControllerManager.GroundController, Enum.HumanoidStateType.Running)
106		elseif CharacterSetup:CheckFreefallState() then
107			CharacterSetup:SetActive(ControllerManager.AirController, Enum.HumanoidStateType.Freefall)
108		end
109	end

The errors are:
Line 103 on CharacterSetup:SetActive(...): Cannot call a value of type *blocked-1074524*
Line 104 on CharacterSetup:CheckRunningState(): Cannot call a value of type *blocked-1074529*
Line 105 on CharacterSetup: Type function instance refine<CharacterSetup, *blocked-1074528*> is uninhabited This is likely to be a bug, ...
Line 106 on CharacterSetup:CheckFreefallState(): Type 'refine<CharacterSetup, ~*blocked-1074528*>' does not have key 'CheckFreefallState'
Line 107 on CharacterSetup: Type function instance refine<CharacterSetup, ~*blocked-1074528*> is uninhabited ...

If there's any more info I can provide please let me know, or if I've made a mistake. Thanks :)