First of all v2 works just fine.. when I don't specify a region and use the custom endpoint s3.ap-southeast-2.wasabisys.com
Switching to v4 however, I can't get things to work. I've tried setting the region ap-southeast-2 with the custom endpoint above, as well as just s3.wasabisys.com (though I don't see how that is correct). Leaving the region empty also produces the same error as below. Any ideas/suggestions?
[20220527 21:48:58] Beginning post processing file <root>wp-content/plugins/akeebabackupwp/app/backups/test.u-20220527-214840utc-Dg0grWqsFQaz5LwW.sql [20220527 21:48:58]
Amazon S3 -- Using signature method v4, multipart uploads [20220527 21:48:58]
Amazon S3 -- Using custom endpoint s3.ap-southeast-2.wasabisys.com [20220527 21:48:58]
Failed to process file <root>wp-content/plugins/akeebabackupwp/app/backups/test.u-20220527-214840utc-Dg0grWqsFQaz5LwW.sql [20220527 21:48:58]
Error received from the post-processing engine: [20220527 21:48:58] The Amazon S3 region provided is invalid.
