Errors on restoration


I encounter some strange errors when I try to restore a mysql backup made by my hosting provider.
I don’t manage to solve the error, even with a new mysql config file.
Perhaps you can help ? I am on MacOSX, mysql Ver 14.14 Distrib 5.7.11

sh-3.2# ./Downloads/xtrabackup-1.6.2/bin/innobackupex ./../Documents/chs-web-02 

InnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oy
and Percona Inc 2009-2011. All Rights Reserved.

This software is published under
the GNU GENERAL PUBLIC LICENSE Version 2, June 1991.

160329 10:23:05 innobackupex: Starting mysql with options: --unbuffered --
160329 10:23:05 innobackupex: Connected to database with mysql child process (pid=23088)
160329 10:23:12 innobackupex: Connection to database server closed
IMPORTANT: Please check that the backup run completes successfully.
At the end of a successful backup run innobackupex
prints "completed OK!".

innobackupex: Using mysql Ver 14.14 Distrib 5.7.11, for osx10.9 (x86_64) using EditLine wrapper
innobackupex: Using mysql server version Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.

Use of uninitialized value $option_ibbackup_binary in concatenation (.) or string at ./Downloads/xtrabackup-1.6.2/bin/innobackupex line 1971.
Can't exec "--print-param": No such file or directory at ./Downloads/xtrabackup-1.6.2/bin/innobackupex line 1972.
innobackupex: fatal error: no 'mysqld' group in MySQL options
innobackupex: fatal error: OR no 'datadir' option in group 'mysqld' in MySQL options


please provide exact commands used for backup, --apply-log and to restore. Along with that show contents for backup-my.cnf from backup directory and my.cnf file of MySQL instance where you are restoring.