ndb_mgmd --initial returned non-zero exit status 1 (no replies)

Using the MySQL 7.5.9 Cluster Auto Installer on RHEL 7.4, and I get the error:

Command '[u'/usr/sbin/ndb_mgmd', '--initial', '--ndb-nodeid=49', '--config-dir=/home/administrator/MySQL_Cluster/49/', '--config-file=/home/administrator/MySQL_Cluster/49/config.ini']' returned non-zero exit status 1

In /tmp/ndb_setup-3808.log, I see:

AssertionError: File /home/administrator/MySQL_Cluster/53/data/auto.cnf does not exist on host 127.0.0.1

In /home/administrator/MySQL_Cluster, I have a 53 folder (with my.cnf, and 3 empty directories: mysql, test & tmp), but no data folder or auto.cnf.

Can someone please help?

Thank you, Brian