Is there any script that can tell me when a pathfinder cannot find a way to its end goal? (without links)

[Ro_Exoticy (Exoticy)]

I want to make it so that whenever a fox detects that its current movement settings literally cannot do anything to get to the player, it will change them.
Honestly, I just don’t know how this will work.
I tried thinking of a few ideas but they were quickly debunked…
– I just want to know how to detect when the game sees the pathfinder as impossible that can be told through script.

local PathFindingService = game:GetService("PathfindingService")
local FoxPathFinder = PathFindingService:CreatePath({
	AgentRadius = 4.25, 
	AgentHeight = 0.5, 
	AgentCanJump = true
})
local WalkAnimation = script.Parent.Humanoid:LoadAnimation(script.WalkAnimation)
local IdleAnimmation = script.Parent.Humanoid:LoadAnimation(script.IdleAnimation)
local JumpAnimation = script.Parent.Humanoid:LoadAnimation(script.JumpAnimation)
local JumpDownAnimation = script.Parent.Humanoid:LoadAnimation(script.JumpDownAnimation)
local function RegularPath()

end
local function AgressivePath()
	if script.Parent.Following.Value == true then
	local StartPos = script.Parent.HumanoidRootPart.Position
	local EndPos = game.Players:WaitForChild(script.Parent.Following.Target.Value).Character.HumanoidRootPart.Position
	FoxPathFinder:ComputeAsync(StartPos, EndPos)
	WalkAnimation:Play()
	end
	for index, waypoint in pairs(FoxPathFinder:GetWaypoints()) do
		script.Parent.Humanoid:MoveTo(waypoint.Position)
		local part = Instance.new("Part")
		part.Position = waypoint.Position
		part.Size = Vector3.new(0.5, 0.5, 0.5)
		part.Color = Color3.new(1, 0, 1)
		part.Anchored = true
		part.CanCollide = false
		part.Parent = game.Workspace
		if	waypoint.Action == Enum.PathWaypointAction.Jump then
			if waypoint.Position.Y >= (script.Parent.HumanoidRootPart.Position.Y - 1) then
			script.Parent.Humanoid.Jump = true
			WalkAnimation:Stop()
			JumpAnimation:Play()
			end
			if waypoint.Position.Y < script.Parent.HumanoidRootPart.Position.Y - 1 then
			WalkAnimation:Stop()
			JumpDownAnimation:Play()
			end
		end
		if game.Players:WaitForChild(script.Parent.Following.Target.Value).Character.Humanoid.Health == 0 then
			script.Parent.Following.Value = false
			return
		end
		task.wait(0.1)
		FoxPathFinder:ComputeAsync(script.Parent.HumanoidRootPart.Position, game.Players:WaitForChild(script.Parent.Following.Target.Value).Character.HumanoidRootPart.Position)
	end
	AgressivePath()
end
script.Parent.Following.Changed:Connect(AgressivePath)

[sponguswastaken (spongus)]

You should likely read this guide if you need anything related to pathfinding: Character Pathfinding | Documentation - Roblox Creator Hub

But, your path should have a Blocked event that you can connect to in order to listen when the path is blocked and at which waypoint it was blocked. Note that this will also fire if the path behind the agent is blocked.