jsonld.ValidationError error during `cp` command

[spelkey-ucd]

Receiving the following error when running cp command:

JsonLdError [jsonld.ValidationError]: Safe mode validation error.
    at safeEventHandler (/Users/spelkey/Documents/projects/caskfs/caskfs/node_modules/jsonld/lib/events.js:135:11)
    at _handle (/Users/spelkey/Documents/projects/caskfs/caskfs/node_modules/jsonld/lib/events.js:82:7)
    at api.handleEvent (/Users/spelkey/Documents/projects/caskfs/caskfs/node_modules/jsonld/lib/events.js:71:3)
    at /Users/spelkey/Documents/projects/caskfs/caskfs/node_modules/jsonld/lib/expand.js:596:17
    at Array.map (<anonymous>)
    at _expandObject (/Users/spelkey/Documents/projects/caskfs/caskfs/node_modules/jsonld/lib/expand.js:560:25)
    at api.expand (/Users/spelkey/Documents/projects/caskfs/caskfs/node_modules/jsonld/lib/expand.js:251:9)
    at api.expand (/Users/spelkey/Documents/projects/caskfs/caskfs/node_modules/jsonld/lib/expand.js:125:25)
    at _expandObject (/Users/spelkey/Documents/projects/caskfs/caskfs/node_modules/jsonld/lib/expand.js:926:35)
    at api.expand (/Users/spelkey/Documents/projects/caskfs/caskfs/node_modules/jsonld/lib/expand.js:251:9) {
  details: {
    event: {
      type: [Array],
      code: 'relative @id reference',
      level: 'warning',
      message: 'Relative @id reference found.',
      details: [Object]
    }
  }
}

This only occurs if there is a space in the name of an ancestor directory e.g:

my-files
-- foo bar
    -- foo.jsonld

cp my-files / will throw an error
cp my-files/foo\ bar / works fine