Q.The Leaves On My 6ft. Coffee Tree Are Shriveling Up; The Tree Had Many Flowers And Beans This Year.
The tree is 15 years old. It looks like it is dying. What could be the cause? It has thrived until about 3 months ago, then went down-hill rapidly. I’ve grown other coffee trees from the beans. Any help would be greatly appreciated. Nothing has changed in his environment, neither position (east window) nor watering nor daily misting. It is always indoors.

Certified GKH Gardening Expert
This can happen if the temperature is too high. Has the temperature inside changed? Is there more sun coming in the window?
Has it been checked for pests such as spider mites or scale?
How long has it been since it has been repotted in fresh soil? If the roots are potbound, it becomes difficult for them to absorb the water and send it up the stems. That could account for the shriveled leaves. Even though you are watering the tree, it may not be getting the water. If it has been more than two years, I would go ahead and repot it, then next spring, prune it way back. Here is how:
https://www.gardeningknowhow.com/houseplants/coffee/pruning-coffee-plants-indoors.htm
I commend you on growing one inside for so long! That is quite a feat!