I'm currently using shader version 8.9F (Modrinth) and when I turned it on I saw this error. I also tried switching to another client (LabyMod, Lunar,...) but I still have this error. . Here is the screenshot:


The shadows of these objects appear as other shadow dots around them. Is this an error in programming? I hope the developers will fix this because this is my favorite shader!

Hello.

I'm 99.999% sure it's not a problem with the shader. It's impossible for me to reproduce the error you're showing here. There's nothing in the shader that could cause this. The way shadows are calculated hasn't changed in any way.
My recommendation is that you reflect on what has changed since the last time it worked well. Have you changed the Minecraft version? Have you added a mod? Have you updated your video card driver? Has your launcher been updated?
I have to mention that there are unofficial launchers that alter the behavior of shaders. So I can't respond about that.
If you've found the problem, please indicate what it was right here.