New turn off player collisions script in Roblox Studio:

local PhysicsService = game:GetService("PhysicsService")
PhysicsService:CreateCollisionGroup("Players")
 
PhysicsService:CollisionGroupSetCollidable("Players", "Players", false)
 
 game.Players.PlayerAdded:Connect(function(plr)
  plr.CharacterAdded:Connect(function(char)
   repeat wait(1) until char:WaitForChild("Humanoid")
   
   for _, characterPart in pairs(char:GetChildren()) do
    if characterPart:IsA("BasePart") then
       PhysicsService:SetPartCollisionGroup(characterPart, "Players")
    end
   end
  end)
 end)