Pre-Hook Key Error: CERTBOT_DOMAIN

[cwchristerw]

Running pre-hook command: /etc/letsencrypt/renewal-hooks/pre/acme-dns-auth.py
Hook 'pre-hook' reported error code 1
Hook 'pre-hook' ran with error output:
Traceback (most recent call last):
File "/etc/letsencrypt/renewal-hooks/pre/acme-dns-auth.py", line 22, in
DOMAIN = os.environ["CERTBOT_DOMAIN"]
File "/usr/local/lib/python3.10/os.py", line 680, in getitem
raise KeyError(key) from None
KeyError: 'CERTBOT_DOMAIN

[cwchristerw]

I'm not sure what may cause this error because python script works properly even with this error.