I'm getting this error after re-creating my entire campaign several times:
Missing or Invalid Field in Promoted Objects: For optimization goal APP_INSTALLS, application_id needs to be valid. Please set it in the Promoted Objects. (#1815437)
Have tripple checked every field, but nothing seems out of place?
I faces the same error and fixed it by going into my app settings (settings -> basic -> ios tab) where I had wrong
bundle idand I also addedApp-Specific Shared Secret(not sure which of those was the real issue). Then I had to delete the affected campaign and create again to avoid the error.