Because curseforge was not logged in, the problem can only be described here.

[Qee1y]

Whether it's explosion blur or water blur, it will cause a black screen.

Using Embeddium

forge 47.2.21 EnhancedVisuals_FORGE_v1.6.9_mc1.20.1

[CreativeMD]

You need to tweak the settings to allow for shaders to work. Not sure what setting exactly is necessary. I guess just try it out.