Shadow artifacts on foliage

Hello,I am getting some shadow artifacts on foliage in many scenes that I bought from market place. I believe it might be some kind of light parameters to tweak? You can see an example scene at the below youtube link that shows clearly the log message that pops up when loading the map and the shadow artifacts on the foliage

Hello and thank you for your message. Yes I have a post process in the seen but I have scene that it is not affected by the post process values. But I will check out the ambient occlusion as you mentioned and see if anything changes.

Looks like ambient occlusion. Do you have a post process in the scene, or have you tweak some project settings?