Drag n Drop .kicad.sch file to https://kicanvas.org/ not working

[Buckler89]

simple_schema.kicad.sch

(kicad_sch (version 20211014) (generator kicad)

  (paper "A4")
  (title_block
    (title "Quadro elettrico semplice")
    (date "2025-06-03")
    (rev "A"))

  (components
    (symbol (lib_id "Device:Relay_SPDT")
      (at 100 100)
      (unit 1)
      (in_bom yes)
      (on_board yes)
      (property "Reference" "K1" (at 0 -5))
      (property "Value" "Relay" (at 0 5))))

  (wires
    (wire (pts (xy 90 100) (xy 100 100)))
    (wire (pts (xy 100 100) (xy 110 100))))
)

Nothing happen if I drag and drop the file on the web page https://kicanvas.org/