Projector/Light shader does not work

Hi, I have been desperately trying to get my projector work but had no luck. Using HDRP.
I tried to create caustic effect on my scene but seems like it does not work. Tried other projetor shaders I could get from the internet neither worked. Any projector prefab from standard material as well. I suspected that my project might be corrupted, so created just new one and found non of projectors works. I wonder if the message in the shader..the cbuffer thingy could be a problem? Any advice to get a projector into my scene?
Big thx in advance!