Exception raised when a wall-clock reading occurs twice in the given time zone — the DST fall-back ambiguity. The wall time exists, but with two different UTC offsets; the caller must disambiguate with an explicit offset.
@type t() :: %Tempo.AmbiguousZoneError{ __exception__: true, options: [integer()] | nil, wall_time: String.t() | nil, zone_id: String.t() | nil }