Restore backup of course from one server to another by lalit thakur - Saturday, 21 May 2016, 4:24 PM Number of replies: 0 Creating temporary structuresDeleting old dataCopying zip fileUnzipping backupError unzipping backup file. Invalid zip file. this error are create when i restore backup of one server to anotherPlease help me , How to fix that error.Thank you Average of ratings: - Permalink Reply