Are you running latest (9.0.3)?
Have you submitted data to EDSM using the EDMC plug in at any point recently? (Once a user submits flight logs with the Journal API via EDMC they can no longer use the flight log API which EDD will rely on for a little while longer)
There is a Synchronise with EDSM button in the ribbon which should send any unsynced flight logs - have you tried that?
Have you submitted data to EDSM using the EDMC plug in at any point recently? (Once a user submits flight logs with the Journal API via EDMC they can no longer use the flight log API which EDD will rely on for a little while longer)
There is a Synchronise with EDSM button in the ribbon which should send any unsynced flight logs - have you tried that?