The log is as follows:
The 2019-11-29 09:09:06 [MgmtSrvr] INFO - Got initial configuration from config/config. Ini, will try to set it when all ndb_mgmd (s) started
The 2019-11-29 09:09:06 [MgmtSrvr] INFO - Node 1: Node 1 Connected
The 2019-11-29 09:09:06 [MgmtSrvr] INFO - Id: 1, the Command port: * : 1186
The 2019-11-29 09:09:06 [MgmtSrvr] INFO - MySQL Cluster Management Server MySQL - 5.7.28 NDB - 7.6.12 started
The 2019-11-29 09:09:06 [MgmtSrvr] INFO - 1 connected Node
The 2019-11-29 09:09:06 [MgmtSrvr] INFO - Starting initial configuration change
The 2019-11-29 09:09:06 [MgmtSrvr] ERROR - Failed to open file 'config \ ndb_1_config. Bin. 1. TMP' while preparing, errno: 2
The 2019-11-29 09:09:06 [MgmtSrvr] WARNING - Node 1 refused the configuration change, error: 6
The 2019-11-29 09:09:06 [MgmtSrvr] ERROR - the Configuration change failed! Error: 6 'Prepare of config change failed'