Lost all leaves

[Ohnereue]

Hello all! So this is my first post....

I have 5 orchid plants and 4 of the 5 are doing great! One of my Phalenopsis has lost all of its leaves but still has healthy looking air roots. Up until last week it had 3 bulbs on it but they wilted before opening/blooming....Not sure whether it is savable? should I fertilize or just leave alone this plant hasn't received any different treatment from the others--same pot and substrate