Ensure your PC firewall or third-party antivirus software isn't blocking outgoing connections on ports 9020/9021. Try disabling your firewall temporarily to test the connection.
: To fix serious system issues, you can download the official reinstallation file (PS4UPDATE.PUP) from the PlayStation Support website .
The PlayStation 4 Express Tool 1.0 Download: Everything You Need to Know Playstation 4 Express Tool 1.0 Download
: Generic "one-click" tools for console modification are often used to distribute malicious software or harvest user data.
The name "PlayStation 4 Express Tool 1.0" is highly suggestive of an all-in-one, "express" modding utility. While this sounds appealing, a tool with that exact name and version number does not exist in the public domain. Ensure your PC firewall or third-party antivirus software
Safeguard your system data, trophies, and user profiles before performing risky system modifications.
Assisting in navigating between different system firmware versions. The PlayStation 4 Express Tool 1
The highly stable "p00bs4" exploit, which requires a specially formatted USB drive.