When I'm trying to restore managed backup using snapshot-installer.php I get the following error:
Warning: ZipArchive::extractTo(***/snapshot_manifest.txt): failed to open stream: Permission denied in *****/snapshot-installer.php on line 864
We could not locate the wp-config.php file in your backup. We could not locate the Snapshot manifest file in your backup.
I can locate both the wp-config.php and the snapshot_manifest.txt files in the archive. I've also tried to unzip it, and the back-up unzips fine, and the correct files are in there.