error.none: No error
error.target_invalid: Target invalid
error.unimplemented: Not yet implemented
short_not_created: Short URL not created for a new target
short_not_found: Short URL not defined
storage_read: Storage read error
storage_unspecified: Storage unspecified error
storage_write: Storage write error
target_blocked: Target blocked
target_censored: Target unavailable for legal reasons
web.error.format:
  description: The format for errors
  one: '{.Kind}: {.Detail}'