Ensure you are trying to install raw .pkg files. Compressed files (like .zip or .rar) cannot be handled by the PS4's installer service.
The most effective fix is often a simple reset of the environment: dpi get info error ps4
If the DPI internal payload remains unstable, you can use the classic homebrew: Download and launch the RPI app on your PS4. Keep the RPI app open in the foreground. Ensure you are trying to install raw
If the PC and PS4 are on different networks or if the PC's IP address has changed, the PS4 may be unable to "talk back" to the server. Keep the RPI app open in the foreground
Are you encountering this error while using the version of DPI or the Android mobile app?
The DPI tool often uses the GoldHEN payload server to send files. Sending multiple payloads in one session can cause the PS4's download service to re-initialize incorrectly, leading to a crash or "Get Info" failure.