Was it a cold day when you moved? It's been barely above zero here for the last couple of weeks. Maybe the plant wasn't protected enough on its journey. Most non-hardy house plants hate cold draughts or sudden changes from warm to cold.
They're very tough, and wouldn't do this just because of light levels (whether high or low), or water quality. I did once kill one, but that was by leaving outside too far into winter. I still see some healthy leaves in the photos, but maybe it would be useful to see the whole plant, especially the 'crown'. Definitely continue holding off with the water - shortage won't do any harm, but excess might.Mine over-winter in a room that's pretty much unheated, and I don't water them at all in winter. They spend the summer outside (avoiding full sun). They'd be in the cool greenhouse, but it's already full! I'm not saying that warmer in winter, and with more water, would be harmful, but I don't have a warmer space for them.I can only really think of rot due to overwatering. Maybe even worth unpotting it to see if it's got live white roots, which are still attached.
So difficult to tell. The remaining leaves look fine (I prefer calling them 'leaves' or maybe 'leaf stalks', as the actual 'stem' is just the thing at the base of the plant). Not sure I see anything like a healthy root there - they look a bit shrivelled and dead - of course there could be other roots further down in the soil, or at the bottom of the pot. I'm adding photos of a plant of my own, but here https://www.reddit.com/r/plantclinic/comments/c4fw6s/my_bird_of_paradise_has_developed_root_rot_do_you/ is a link I found with a photo of someone's plant showing live white roots, and dead/rotted black ones. Even the white ones seem to have the black stuff towards their tips, maybe spreading upwards. The soil in that photo looks very wet - has it been standing in water, which would likely cause the rot?I'm hesitant to say to mess with the plant, in case little is wrong, but I think I'd be checking for life in those roots - if they're squishy, or just fall to bits, they're not alive, and better removed. If the 'crown' (the short 'stem' at the bottom to which the leaves are attached) is free of rot, then it might put out more roots. But if it's rotted, then the leaves would continue to die one by one as they find they're no longer attached to anything living. If it was me, I think I'd be taking out of the pot, and shaking the soil off (and if roots just fall off, then they were dead anyway). Depending on what's found, put back in pot, and keep dryish - no harm done either way.My photos (and comments between them, if I can get the text in the right place)The plant, with some of the soil removed. The is the small one of 4, which I got by dividing a large clump which a friend said had out-grown them (I intend giving them one of the resulting plants back again). As I grow them outside in summer (avoiding full sun, which can scorch the leaves) it's fairly compact, with leaves that stand up and don't flop. Closer up, you can see healthy roots (though a bit shrivelled - it's bone dry, as I keep in rather cold room over winter). I do sometimes wonder what the big fat roots are for - I imagine the plant actually feeds through the small roots, so why does it need these great fat 'storage organs'?And the bottom of the rootball after taking the plant out of the pot. The fat roots always end up coiling round the bottom of the pot, leaving a space with just roots and no soil, eventually pushing the plant out, or breaking the pot. I'll probably repot this one in spring - it's not a very large pot - but then people say they flower better if pot-bound (these 4 plants haven't flowered at all yet) - maybe 3 years since I divided from the friend's clump.The time I killed a plant (left in the frost), there were still healthy looking white roots at the bottom of the pot. You'd imagine maybe they'd be able to grow new plants (like e.g. potatoes) but they don't seem to.