Q.Yucca
Hi. Do you think my indoor yucca plant has a disease or something temporary that I can help rectify, such as over watering?

Certified GKH Gardening Expert
It does appear to be related to overwatering. Make sure that the soil has a chance to dry out thoroughly between waterings. Yucca will tend to prefer dry soils, and this will be especially true indoors.
Here is an article that will help you with their care:
https://www.gardeningknowhow.com/ornamental/foliage/yucca/growing-yucca-indoors.htm