1. Can you report the full output of running dcm2niix

2. The complete output reports the version in the first line of output:
  Chris Rorden's dcm2niiX version v1.0.20220720 Clang12.0.5 ARM (64-bit MacOS)
If you are using a version prior to v1.0.20220720, does upgrading resolve your issue?
  https://github.com/rordenlab/dcm2niix/releases/tag/v1.0.20220720

You can get the latest stable version from NITRC or Github
  https://github.com/rordenlab/dcm2niix/releases