What you have in the AWS access ID field is wrong. You need to create an Access Key in the AWS console, if you don’t already have one. (I would strongly recommend creating a separate user in IAM just for backups, and grant it access only to the bucket you are using for backups.)
The AWS access ID is a string of letters and numbers like this:
And the access key looks something like this:
Also the name of your bucket is almost certainly not “backup” as the names must be globally unique. Did you already create the bucket in the AWS console?
Finally, I recommend not using archive tiers of storage like Glacier. By default Duplicati wants to be able to easily read your backup data for purposes of testing archive integrity, pruning data, compacting volumes, etc. Cold storage like Glacier does not allow immediate access so these operations will fail. If you really want to use it, you need to disable a few Duplicati options like version pruning, compaction, and archive testing.