I can't seem to find anything wrong with the wirings.
There is no enable, the SSRs are ON, the PSUs are ON, the drivers are green (LED), I can't see the driver's connectors clearly but, as far I can see, Black and Green are GND and connected to DIR- and PUL-.
As to why the motors are not enabling, I have no idea. There is nothing suggesting they wouldn't be powered on.