After recent upgrade from 23.3.x to 24.3.x, any user other than Superuser can no longer edit or run NCM policies even though they have full access to to NCM privileges:
DX NetOps Spectrum 24.3.x
While the issue was not reproducible in 25.4.x, if you're still running any version of 24.3.x, then the fix for this is to upgrade to release 25.4.5.