"Id 0 was not found in object' on ContactCard ReadMultiple with LastDateTimeModified Filter

Hi ,
I am facing an issue with my Integration BC/NAV in PHP, when I get Contact from NAV with LastDateTimeModified Filter I am getting the response "Id 0 was not found in object’ on ContactCard ReadMultiple.

If I remove LastDateTimeModified Filter, then it’s working fine, Kindly suggest the which date time format I use?

Thanks