User is denied access without "read" permission to the physical path

I am trying to create an upload-only SFTP Server.

But, if I deny the physical path "read" permission to the user, it fails to login:

Server log:

2021-07-21 16:45:37.460 +00:00 [Error] Session 4: Error while initializing subsystem (sftp): nmfqt.pabbe: Access denied.
at nmfqt.kuvgb.ybxbw(String p0, FileSystemOperation p1, FileServerAction p2)
at nmfqt.kuvgb.dobwe(String p0)
at nmfqt.uyjub.nsjsn(nsbrt p0, String& p1)
at nmfqt.ivqkh.lromo(zyjht p0, bqsol p1, String p2, String& p3)
at nmfqt.clxpq.nmfqt.ngxrj.udyux(String p0, String p1, String& p2)
at nmfqt.hfswm.wbirm(String p0, String p1, Boolean p2)

Access log:

20210721164537.457,"127.0.0.1",4,"alice","login",[]
20210721164537.459,"127.0.0.1",4,"alice","access",["/mount", "Read"]
20210721_164537.464,"127.0.0.1",4,"alice","logout",[]