Unrealistic texture size
When you upload a material with textures, the textures should represent a certain real-world space. For example, 1x1 meter of tiles, or 4x4 meter of grass.
Please specify the correct value in the 'Texture size in meters' parameter.
When it comes to procedural materials, we recommend testing them on objects with non-automatic texture space, set to 1x1x1 scale.
Thanks and keep on texturing!