When i try to set the acl webmin gives me -R: no such file or directory

This image shows what I want to change. Specifically, I want to recursively remove all ACLs in the folder /mnt/Raid/Movieraid. The command that should be generated is /bin/setfacl -b -R /mnt/Raid/Movieraid, and it works when launched from the bash. I've tried to select and deselect and do many combinations of the parameters but withtout success. The problem can be the -R or the -b

This is the error shown when I try to do the operation.