Trying to backup an individual domain, eventually all domains, to a home S3 compatible server (minio) which has wildcard SSL and DNS. Tried the forum here: https://www.virtualmin.com/node/68068 (contains all server info and a longer description of the problem/what I've tried)
Using virtualmin backup interface I get told there was an error listing buckets, or with the command-line version it reports: An error occurred (InvalidAccessKeyId) when calling the ListBuckets operation: The AWS Access Key Id you provided does not exist in our records.
Using aws cli works fine.
[root@lon ~]# aws s3 ls --endpoint-url https://s3.home.mortgages4all.co.uk
2019-12-15 18:41:15 bucket2
2019-12-16 07:14:03 test-bucket