Saturn only print the First layers

[Matocs]

Hi everybody, for few weeks my saturn cant print correctly , it only print the bottom layers but the support and everything else are printed on the FEP as you can see on the picture , i changed the exposure time according to my resin doc (clear red elegoo) but nothing changed , i also leveled multiple time the plate , same result.
thanks by advance for your reply.
PS : same problem than this post : https://www.elegoomars.com/forum/showthread.php?tid=802