Once the cane turns black it's dead. It needs to be removed. If you look at the roots on that cane you'll see there are no white feeder roots left. All those black roots have died. You need those live white feeder roots for the plant to live. The rest of the plant does look green and seems to have a lot of leaves. The soil looks a little dry to me. I would give some extra water and keep it continuously moist and see if that helps. Also maybe some partial shade during the hottest part of the day.

Thank you for the advise, I've got to learn some things here that only years of experience I don't have will prove. I've lost it yesterday. I'll ask a local relative to overnight me some more rooted shoots and try my hand at this again - using all the knowledge shared. However, I'll plant the new ones in the ground. My great aunts monster mother plant seems to thrive on neglect.

Thank you again.

I pulled it out of its pot and that there are some healthy looking white roots/with the lower stem darkening. I'll wash off potting soil and sterilize my clippers and clear out the dead/black roots and place in a sunny spot and create some shade until she shows signs of survival. Thank you again.

too much water causes the canes to turn black. I learned the hard way. I lost 40 cuttings!

It can be a fungal disease as well.