Schefflera plant

Question

When new shoots come out, they turn black and fall off.

Answer 1

You may be overwatering your plant. Schefflera plants should be allowed to dry out between waterings. If the soil is soggy the roots can die off from root rot.
Make sure the pot is draining excess water.
The link below will refresh you on the care requirements.

https://www.gardeningknowhow.com/houseplants/schefflera/schefflera-plant-care.htm