Error Parsing S.TaggedError in Effect RPC Client Failure

export class AddSlackReaction extends S.TaggedRequest<AddSlackReaction>()(
    '@markprompt/Integrations/AddSlackReaction',
    {
      failure: S.Union(
        S.instanceOf(SlackAlreadyReactedError),
        S.instanceOf(SlackGenericError),
        S.instanceOf(SlackNotFoundError),
        S.instanceOf(SlackInvalidTokenError),
        S.instanceOf(SlackInvalidNameError),
      ),
      success: S.Struct({
        ok: S.Boolean,
      }),
      payload: {
        projectId: S.UUID,
        slackUserId: S.String,
        channel: S.String,
        timestamp: S.String,
        name: S.String,
      },
    },
  ) {}

ParseError: (ExitEncoded<{ readonly ok: boolean }, SlackAlreadyReactedError | SlackGenericError | SlackNotFoundError | SlackInvalidTokenError | SlackInvalidNameError, Defect> <-> Exit<{ readonly ok: boolean }, SlackAlreadyReactedError | SlackGenericError | SlackNotFoundError | SlackInvalidTokenError | SlackInvalidNameError>)
└─ Encoded side transformation failure
└─ ...
└─ Expected SlackAlreadyReactedError, actual {\"message\":\"You have already reacted with this emoji\",\"_tag\":\"SlackAlreadyReactedError\"}
└─ ...