Root system looks destroyed....
You can put a humidity dome over it and it will probably open back up again.
But why bother? just start a new one.
The root system is probably unable to take up water. the humidity dome would help the plant get hydrated. if you flushed with enough distilled, transplanted, and then domed it... it might hydrate itself and grow new roots, eventually.
I would not bother though.
I had genetics I could not lose that had roots destroyed by aphids... i did the above and it worked. with an unproven seedling though... don't even know if it is good or female... not even worth it.
But, that method above is good knowledge. You can kill your root system, and as long as you act soon enough you can save the plant... you basically are just rooting it like it is a clone. In a situation like root aphids, you obviously want to kill all the bugs first.
I once had a friend babysit a plant for me... it was the only plant i brought with me into this city.... somehow... a fucking bottle of windex got spilt in the dirt.... i I Have no fucking clue how that scene played out... she felt so bad that I just let it go like it was no big deal. Hilarious though. A fucking bottle of windex, spilt into a plant? !? How?