The file : PMDG/SIDSTARS/EDDF.txt contains a not existing Runway.
should not be in this file because there is no runway36 in EDDF.
a runway has always two physical threshold coordinates. Therefore both ends have to be stored in the navigation database.
For the PMDG 777 RWY N/A issue, I verified today again, that deleting ARPT_RWY.dat solves the problem, as the 777 regenerates it containing the RWY 36 at EDDF.
If that shouldn´t work delete the FMCPWP and the SID/STARs folder completely and reinstall the airac.
For some reason some older files could create trouble: