I’m following this guide: Clone - MainWP Knowledgebase
The direct cloning option that doesn’t use a backup file is not an option because it won’t work with the same URL given that the DNS can’t simultaneously point to the source and destination. So, I created the full backup, including database, sitemap, etc. It’s saved as a .zip which I’ve manually uploaded to the destination. However, the process immediately fails with the message “Cant read configuration file from the backup.”.
I tried it over with a .tar.gz and it had the same error. The archives are not corrupted.