The message seems to indicat that the footprint does not exist in your installation. If you add the symbol as is and try to create a pcb does it give you an error message? If so it might be because you had v4 installed in the past and KiCad still points to the old online footprints. If that is the case then this could help you out: I had KiCad 4 installed previosly. Now i updated to v5. Now i have some problems with the library setup