To be completely honest, it doesn't look good to me. Like LGray said, it looks like it may be close to death, whether by natural or molt related complications.
I agree with LGray, try an ICU if you're seeing movement at least a little bit. If it's only been 3-4 weeks since the last molt I highly doubt it's another molt coming on.
Did you use any products near the enclosure? Try different substrate? Anything at all out of the ordinary?
I hope he pulls through for you.![]()