Transfer Family StartFileTransfer returning InvalidRequestException Errors

After following the deployment notes and deploying this solution I found that this was not transferring any data. After some Investigation I found StartFileTransfer API calls returning InvalidRequestException errors. This seems to be related to an extra forward-slash ("/") in the localDirectoryPath requestParameter on this line: https://github.com/aws-samples/file-transfer-sync-solution/blob/main/transfer_sync_service/lambda/sync_files/sync_files.py#L239

`LocalDirectoryPath=f"/{event['SyncSettings']['LocalRepository']['BucketName']}/{event['SyncSettings']['LocalRepository']['Prefix']}{current_prefix}",`

There is an extra slash between `{event['SyncSettings']['LocalRepository']['BucketName']}` and `{event['SyncSettings']['LocalRepository']['Prefix']}` because `{event['SyncSettings']['LocalRepository']['Prefix']}` already has a leading forward-slash?