
Certified GKH Gardening Expert
These are heavy feeders and can be susceptible to many diseases in container. Without seeing the damage, it will be hard to know whether this was a feeding issue, or a fungal issue, but both are very common.
You can try your local extension service. They will have people in your area that can help. This link will help you to find the closest one to you: https://www.gardeningknowhow.com/extension-search
This article will help you to care for figs in container: https://www.gardeningknowhow.com/edible/fruits/figs/growing-figs-in-pots.htm