This is formally called Portulacaria afra, not even remotely related to Jade. If you search that name, you can see care instructions.

I've killed this plant several times, so I am no position to offer help. Someone else will come along & offer help.

What potting mix did you use? Does the pot have a hole in the bottom? Did you put it back in the same pot?

As far as potting mix is concerned, many people here recommend commercial cactus and succulent mix combined 50-50 with perlite from your nursery. This gives you a fast draining mix since succulents don’t like to be wet too long. Also make sure your plant gets plenty of bright light or even direct sun.

There is an easy way to tell if your plant needs water: take it wooden skewer and insert deep into the potting mix. Wait a few minutes, when you pull it out, if it’s damp don’t water.

@socks Thank you! I think the cactus/succulent mix is the answer. It was happy in the soil I bought it in and then I repotted it with regular potting soil.