EXTREMELY IMPORTANT: Please attach a ZIP file containing your Akeeba Backup log file in order for us to help you with any backup or restoration issue. If the file is over 10MiB, please upload it on your server and post a link to it.
After the backup was completed. I click the download button but got this message below.
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Downloading backups through the browser is disabled by defaultYour current server settings may result in a corrupt (or broken) file when downloading through the browser. Downloading backup archives through the browser is disabled by default because it's likely that another plugin or PHP may add unexpected date at the beginning or the end of the backup archive. This would corrupt (break) the backup archives you download through the browser, making them impossible to restore.
Can can enable downloads through the browser at your own risk in Akeeba Backup for WordPress's System Configuration page.
You can close this dialog and use FTP in Binary
transfer mode or SFTP to download your backup archives from your server.
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How to enable this.