Okay, so the error says:
-- Configuration is not a valid member of VehicleSeat -- Script 'Workspace.WealthyDrakor.Seat.Script'.Line 5 -- Stack End
Configuration is a folder that IS INSIDE the VehicleSeat
This is line 5 of the script:
local data=script.Parent.Configuration
Most likely, the Script is running before the VehicleSeat has been fully initialized/replicated.
See if this code fixes it for that line:
local data = script.Parent:WaitForChild("Configuration")