Sass error: 'neg-4' is not a valid USWDS margin-horizontal token

[maya]

Sass:
@include u-margin-x("neg-4");

    messageOriginal: "'neg-4' is not a valid USWDS margin-horizontal token. Valid tokens: 1px, 2px, 05, 1, 105, 2, 205, 3, neg-1px, neg-2px, neg-05, neg-1, neg-105, neg-2, neg-205, neg-3, 4, 5, 6, 7, 8, 9, 10, 15, card, card-lg, mobile, 05em, 1em, 105em, 2em, 0, auto"
   ╷
57 │     @return uswds-error(
   │ ┌───────────^
58 │ │     "'#{$token}' is not a valid USWDS #{$type} token.#{$valid-token-message}"
59 │ │   );
   │ └───^

Docs site says I should be able to use them: https://designsystem.digital.gov/design-tokens/spacing-units/

[mejiaj]

Closing this since #4212 got merged.