Loading an E57 point cloud error - "Failed to convert point to ECEF"

Hi guys

It's my first time trying to incorporate laser scan data into my Context Capture process. However, when I go to load my E57 file, I assign it the coordinate system it is in (New Zealand Transverse Mercator), but I then get an error message that says "Failed to convert point to ECEF".

What might be the cause of this?

I presume if my point cloud is not actually in this coordinate system would be one potential cause?

Could my E57 file be in the wrong format?

What else could I trouble shoot?

Cheers

Caleb