Update: Just a quick update here, I've solved the problem myself. Thanks to those who tried to help :)
Explanation: So I tried to clone a CrackPart from ServerStorage to Player's LeftFoot when a player lands after jumping. However, the CrackPart is not cloned at where I wanted. Initially, I wanted the CrackPart to be cloned just below a player's foot but it ended up cloning above player's head just before a player lands which is not supposed to do so as it was supposed to do that after the player has landed.
I have 2 scripts, 1 LocalScript named "PlayerHumanoidStatsLocal" located in StarterPack and 1 ServerScript named "PlayerHumanoidStatsServer" located in ServerScriptService, and CrackPack is located in ServerStorage. Both scripts communicate through RemoteEvents.
There is no error shown. Here's how the whole process looks like: https://vimeo.com/404506487
Here are my scripts:
LocalScript:
local Player = game.Players.LocalPlayer
local HumanoidStateChangedEvent = game:GetService("ReplicatedStorage"):WaitForChild("EventsFolder"):WaitForChild("HumanoidStateChangedEvent")
repeat wait() until Player.Character
if Player.Character then
Player.Character:WaitForChild("Humanoid").WalkSpeed = 40
Player.Character:WaitForChild("Humanoid").JumpPower = 200
end
Player.Character:WaitForChild("Humanoid").StateChanged:Connect(function(OldState, NewState)
if NewState == Enum.HumanoidStateType.Landed then
HumanoidStateChangedEvent:FireServer()
end
end)
ServerScript:
local HumanoidStateChangedEvent = game:GetService("ReplicatedStorage"):WaitForChild("EventsFolder"):WaitForChild("HumanoidStateChangedEvent")
HumanoidStateChangedEvent.OnServerEvent:Connect(function(Player)
print("Signal Received From PlayerHumanoidStatsLocal")
local CloneCrackPart = game:GetService("ServerStorage"):WaitForChild("CrackPart"):Clone()
CloneCrackPart.Parent = Player.Character.LeftFoot
CloneCrackPart.CFrame = Player.Character.LeftFoot.CFrame
wait(1)
CloneCrackPart:Destroy()
end)

4 comments
On line 2 in the local script and line 1 in the server script, you need the parenthesis after :WaitForChild because it is a function
He already has it, you have to "view source" to see it. As a question to guest_2018, is the part that's being cloned anchored?
yes it is anchored @noahsrebels
if the part is not anchored it will fall off the map @noahsrebels