plugin ofn3-layer-tiles: unexpected EOF on loading

[Ofnuts]

Works for me

Otherwise:

• Is ofn3-layer-tiles.py exactly 17571 bytes?
  
• What is your exact Gimp version? 3.0.0, 3.0.2, 3.0.4? Other?
  
• If you go to Help > Procedure browser and search for ofn3 do you see ofn3-join-tiles?