Cannot Create a Depreciation Journal Error - 'Unmapped Nominal Directors'

If you receive the message stating, Unmapped Nominal Directors when posting a Depreciation Journal, then it is the case that one of the Asset Codes that the depreciation is running on is missing information used for posting Depreciation Journals.
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The message should state how far the depreciation journal got in the Direction flow.
The flow will usually go:

If you must add an Asset Location but you are unable to modify the information of the asset, it will need to be changed via support. Please contact us and reference the title of this article.