I would not recommend to directly unzip the files from DPK. Rather try running the below command to just extract the PS_APP_HOME.
psft-dpk-setup.<ext> --env_type midtier --deploy_only --deploy_type app_home
Hope this helps
You must not unzip the files directly. There are certain commands to extract the required software. Please follow the below link:
Task 2-2: Reviewing the DPK Setup Script Options