Package whatsyoursign: Can't uninstall

[axman6]

The package whatsyoursign by @objective-see seems to install in a way that it appears to be impossible to uninstall. When running brew uninstall whatsyoursign I get the following output:

brew uninstall whatsyoursign
==> Uninstalling Cask whatsyoursign
==> Running uninstall script /usr/bin/pluginkit
==> Removing files:
/Applications/WhatsYourSign.app
~/Library/Application Scripts/com.objective-see.WhatsYourSignExt.FinderSync
~/Library/Containers/com.objective-see.WhatsYourSignExt.FinderSync
rm: /Users/ME/Library/Containers/com.objective-see.WhatsYourSignExt.FinderSync/.com.apple.containermanagerd.metadata.plist: Operation not permitted
rm: /Users/ME/Library/Containers/com.objective-see.WhatsYourSignExt.FinderSync: Operation not permitted
Error: Failure while executing; `/usr/bin/sudo -E -- /usr/bin/xargs -0 -- /bin/rm -r -f --` exited with 1. Here's the output:
rm: /Users/ME/Library/Containers/com.objective-see.WhatsYourSignExt.FinderSync/.com.apple.containermanagerd.metadata.plist: Operation not permitted
rm: /Users/ME/Library/Containers/com.objective-see.WhatsYourSignExt.FinderSync: Operation not permitted

When I try to delete the file myself using sudo rm -rvf /Users/ME/Library/Containers/com.objective-see.WhatsYourSignExt.FinderSync/ I get the same Operation not permitted error.

I'm guessing this is a problem with how whatsyoursign installs itself, but recording it here too as it is likely to affect homebrew users. I've added a comment on the upstream repo: objective-see/WhatsYourSign#27

[WinkelCode]

I was able to update to the latest WhatsYourSign version just fine by running brew reinstall whatsyoursign and then manually running the command to open the installer app.

Are you able to remove the folder from recovery mode? Is it possible that it somehow became SIP protected?