“Address family not supported by protocol” means your MaxScale instance is attempting to bind to IPv6 addresses, but your system doesn’t support that for some reason. IPv6 support was added in MaxScale 2.1:
MaxScale 2.1.2 added support for IPv6 addresses. The default interface that listeners bind to was changed from the IPv4 address 0.0.0.0 to the IPv6 address ::. To bind to the old IPv4 address, add address=0.0.0.0 to the listener definition.
So, If you want to try IPv4 address then you need to add the following to Read-Only Listener, Write-Only Listener or other mentioned Listeners in maxscale.cnf file :
Now start maxscale and I hope, it will work.