OpenSUSE not permitted on an encrypted partition

Do you have any experience of installing openSUSE on an encrypted partition? I wanted to do it but I encounter this error (See attached screenshot). It would be very helpful if you could provide any assistance. I urgently need a solution to this.
Error
You have assigned an encrypted file system to a partition with one of the following mount points: "/", "/usr", "/boot", "/var". This is not possible. Change the mount point or use a nonloopbacked file system.
