Creality Hi probs

hey there,

i have had a Creality HI for about 350 hrs now and just recently started producing terrible prints, under extrusion weird layer line, and many others all out of the blue, does anyone know why this could be happening, and also im sooo confused about the motion advance/auto pressure advance on creality Hi everytime i stard a print it says file is not supported for auto PA i dont know where it is in the slicer and why it would be giving that sort of error message