LNM Version 2.6.6 with FSMS2020 and actual Navigraph
LNM does not find the airport Rostock/Laage and therefore it cannot be selected for a flightplan.
However all Waypoints in the area are there, just not the airport.
In MSFS2020 it is possible to select this airport for a flightplan, it's data and charts are also available in the Navigraph database. A separate try with Sinbrief also works for this airport.
Any ideas what is wrong, or what I am doing wrong?