backupmanager

Hello, for some time now I have a problem with Plesk Backup Manager. All Backups fail with following Error Message for each Subscription/Domain: JMS\Serializer\Type\Parser::getConstant(): Argument #1 ($value) must be of type int, null given, called in...

Backup manager emails me the following error. Any idea what this means? "The following error occurred during the scheduled backup process: no element found: line 1, column 0" OS CentOS Linux 7.8.2003 (Core) Product Plesk Obsidian Version 18.0.29 Update #3, last updated on Sept 3, 2020 11:05 PM