Texture is missing when created a new Terrain

Steps to reproduce:

1. Create a new Project
2. Create a Terrain object

Actual Result: Texture is missing

Expected Result: Texture sets on the Terrain

Environment:
Mac 10.14 and Windows 10

Reproducible on:
19.3.0a2, 19.3.0a1, 19.2.0a14, 19.1.0f2

Working Fine on:
18.3.0f2