https://www.esoui.com/forums/showthread.php?t=236 mentions to post the log file. I don't see that.
"Error 5" is probably a Windows error. That error indicates that you do not have the required permissions to access a file, admin or not. The installation of a tool like Minion can't be resolved with an update or fix when it is a Windows message because programming tools used to make tools and installers like Minion respect Windows permissions.
https://www.esoui.com/forums/showthread.php?t=8082
The second link are the troubleshooting steps. You have to try them all in order. Especially steps 3, 4, and 5 could give you some results as I have made tools for single player games and it's fairly well known to never install things into Program Files because of permission issues.