What's the full command you are using or what are you trying to do?
The full command was
xattr -cr /Applications/RyuSAK.app
Try
xattr -rc
It’s hard for anyone to help if you don’t give details, but I can only guess …..
The man page describes -r starting
If a file argument is a directory …
So, did you specify a directory?
Yes I wrote
xattr -cr /Applications/RyuSAK.app
Then remove the ”r” in ”-cr”? The .app is like a special zip file or something if I remember correctly. Not a directory
Are you using the standard xattr command that's built into macOS? IIRC there's another program out there by the same name with completely different syntax. Try running type xattr; it should say something like "xattr is /usr/bin/xattr" if you're using the standard one.
What's the full command you are using or what are you trying to do?
The full command was
Try
xattr -rc