Certified GKH Gardening Expert
Those berries are not growing from that plant are they? hibiscus do not produce these. Are they just a container decoration, or are they growing on the shrub?
Regardless, I notice the webbing on that branch, and immediately know exactly what is happening. You have a spider mite infestation!
If they aren't cleared up, they will, ultimately, kill the plant. This can be solved a number of ways, and this collection of articles will help you to craft your own insecticides: https://www.gardeningknowhow.com/special/organic/