Have other vehicles been able to charge using that exact same unit at that location recently?
Not sure what's a good crowd-sourced database for your area, but in the US, https://www.plugshare.com/
(and its apps) are GREAT!
I would try other DC FCs, to be sure. Have a pic of its connector? Some in the US use a horrible early Yazaki connector where it was easy to screw up connecting and disconnecting (first three styles at viewtopic.php?p=457969#p457969
). The later version w/a yellow button is MUCH better. There are many other styles: https://www.chademo.com/products/connectors/
If you don't fully push the connector on and properly latch it to the car, you will likely receive a communication or CAN error.
If it has problems on every known working CHAdeMO DC FCs you try (esp. if it's from a different vendor), then you could get Leaf Spy Pro and a compatible w/the app dongle for your phone OS to retrieve the DTCs, if any. Dumb question: you do have the car powered off completely before you attempt to CHAdeMO charge, right?