Unity Terrain Glossy with White Patches - unity3d

I am new to Unity and I am having difficulties applying the terrain tools. How can I fix glossy terrain with white spots within 2021.3.5f1 Unity? I'm unsure why this is happening to all of my terrain layers.
The textures are from the Unity Terrain Tools asset
I even deleted the terrain I created above and created a new 3D object > Terrain (without any adjustments). I painted the new terrain with the Unity asset textures used in the world above.
Then I started raising the terrain to create mountains, but this caused it to create white spots on the scene. See the image below:
What am I doing wrong? What would be the correct way of importing assets or textures within assets?

Convert Rendering Pipeline in Unity 2021.3.5f1's verison

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https://renderedsmoothie.wordpress.com/2013/08/31/how-to-bake-textures-and-materials/
https://www.blender.org/manual/render/workflows/bake.html
https://www.youtube.com/watch?v=Tj-S5QAac3U