Unable to find server

Cluster server names are maria1, maria2 & maria3. Cluster is replication. I can access them from maxscale host using:
$ mysql -h maria1 -u max -p

When starting maxscale I get:
$ sudo systemctl start maxscale
...
unable to find server 'maria1' that is configured in the monitor 'Galera Monitor'.
...
unable to find server 'maria3' that is configured as part of service 'Galera Service'.

That for all three servers.

My maxscale.cnf contains:
...
[Galera Service]
type=service
router=readconnroute
router_options=synced
servers=maria1,maria2,maria3
user=max
passwd=FB5D3518F83EC3EE40F800EFCD7F72B0
...
[server2]
type=server
address=192.168.1.122
port=3306
protocol=MySQLBackend

And names are accessible via /etc/hosts. Please help, I can't go any further with maxscale.