244: Embedded file used for unrecognized metadata name

You have declared metadata with an embedded file as value, but embedded files are not supported as values for the given metadata name.

Solution

Embedded files can only be assigned to a few metadata names. Check your spelling, if you meant to assign the file to one of the supported names. Other metadata names can be declared with a textual value like

@ ICBM: 12.345, 67.890

or with a link like this:

@ NPT: ->https://disarmament.unoda.org/wmd/nuclear/npt/