Error: plugin "diff" exited with error

[calbot]

I'm getting the following error...

I'm running the following command:
helm diff upgrade --install --detailed-exitcode --allow-unreleased --disable-validation apis ./helm/apis
[DIFF OF ONLY ONE SERVICE HERE BUT NOT OTHER EXPECTED DIFFS]
Error: identified at least one change, exiting with non-zero exit code (detailed-exitcode parameter enabled)
Error: plugin "diff" exited with error

If I run the following I get no output but expect there to be a diff since a image version was changed...
helm diff upgrade --install apis ./helm/apis

How do I diagnose and fix the diff?

[calbot]

If I manually diff using the following two commands output it looks correct. For some reason helm diff gives the above error.
helm get manifest apis
helm upgrade --install apis ./helm/apis --dry-run

[yxxhero]

--detailed-exitcode @calbot please read the help message of this flag.