Hi, I also faced a similar issue.
I am running it over Raspberry Pi 5.
Could not load lib /usr/lib/aarch64-linux-gnu/post_processes/libface_detection_post.so: cannot open shared object file: No such file or directory
In my case, the libface_detection_post.so file wasn’t present in that path, so searched for it and put the correct path, and updated it. After that it worked fine.