I just checked my local test environment and when you let Windows automatically manage paging file size for all drives, this will prevent any data from being stored about the page file in the WMI Class Lansweeper scans the information form.
Try turning off this option as seen in the screenshot below. Rescan the asset with the Rescan Asset button on the asset's page to force a full rescan.
Lastly, you can manually check the WMI class' information by running this PowerShell command:
Get-Wmiobject Win32_PageFile