This error can occur during a restoration or migration process. When the error occurs, our plugin can not unzip your backup. Because the backup is either incomplete or corrupted. This may happened during the process of downloading/transferring the backup file.

A general solution to this error would be:

1. Removing the backup file from backup list of the target site.

2. Check and free up your source/target server disk space. Generally, in order to backup/restore successfully, the available disk space needs to be at least twice the website size.

3. Create a new backup of the source site, upload it to the destination site and restore. Or, upload the backup to the wp-content/wpvividbackups directory of the target site via an FTP client or a file manager, then click the Scan uploaded backups button on WPvivid to display it on the backup list then restore.