Minio External image storage error

Error logged:
t=2020-09-21T19:18:50-0400 lvl=eror msg=“Failed to render and upload alert panel image.” logger=alerting.notifier ruleId=4 error=“RequestError: send request failed\ncaused by: Put “https://grafana.minio.xxx.yyy.com/images/WAu91y7J7a35jx0UjyIY.png”: dial tcp: lookup FQDN on :53: no such host”

External image used is on-premise minio.

Has change: github.com/grafana/grafana/pull/20354 been added to v7.1.5?
If it has, can someone point me to examples where I can check against my configuration?
Have read the config document but no luck in getting to work.

Thanks,
Andy

Configuration for above.
FQDN = https://minio.xxx.yyy.com

[external_image_storage.s3]
endpoint =
path_style_access = /grafana
bucket = grafana
region = us-east-1
path = images
bucket_url = /grafana
access_key =
secret_key =

Please note: specified URL into FQDN to bypass newuser limit for links.