Check your model number on the back sticker. If you have a Fat that previously had CFW, a corrupted NOR/NAND might cause HEN to fail. You may need to use a different exploit (e.g., PS3Xploit 2.0) before HEN.
The PS3 homebrew community is active on various forums and social media platforms. Sites like Reddit's r/ps3homebrew or specific PS3 forums can be invaluable resources for troubleshooting. ps3 hen auto installer failed
If you're installing from a PC, ensure that any antivirus software is temporarily disabled, as it can sometimes interfere with the installation process. Check your model number on the back sticker