Currently, passengers seems to disappear as soon as they reach their seats, in the new PMDG 737-800. Can someone confirm the same, or is it something on my end only?
You can't have Seated Passengers on an unsupported airplane, and a supported airplane must be added to both the FSDT Installer and the GSX code as well. Support for the PMDG 738-800 has been added in today's update, version 3.7.4