PHP Fatal Error when attempting to reset roles

I’m attempting to reset the roles on my site, but am presented with an error in my php log when attempting to do so from https://www.example.com/wp-admin/admin.php?page=pp-capabilities-backup

 PHP Fatal error:  Uncaught Error: Call to undefined method CapabilityManager::setAdminCapability() in /var/www/example/wp-content/plugins/capability-manager-enhanced/includes/backup-handler.php:294\nStack trace:\n#0 /var/www/example/wp-content/plugins/capability-manager-enhanced/includes/manager.php(1098): Capsman_BackupHandler->backupToolReset()\n#1 /var/www/example/wp-includes/class-wp-hook.php(308): CapabilityManager->backupTool()\n#2 /var/www/example/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()\n#3 /var/www/example/wp-includes/plugin.php(517): WP_Hook->do_action()\n#4 /var/www/example/wp-admin/admin.php(259): do_action()\n#5 {main}\n  thrown in /var/www/example/wp-content/plugins/capability-manager-enhanced/includes/backup-handler.php on line 294, referer: https://www.example.com/

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