Exception raised when a known currency code has no localized data in the requested locale.
Distinct from Localize.UnknownCurrencyError, which signals
that the currency code itself is not a recognised ISO 4217 or
registered custom currency. This error means the code is valid
but the locale's CLDR currency map has no entry for it.
Pass fallback: true to Localize.Currency.currency_for_code/2
to walk the CLDR locale fallback chain (and the application
default locale) before failing with this error.