Run the script in the Discord dev tools console. Copy the ID (not index) of one of the quests in the table, and run `await completeStreamQuest("18-digit-id-here")`. Do not close the window until it has finished.

claim-discord-quest.js

const {completeStreamQuest} = (() => {
  let wpRequire;
  webpackChunkdiscord_app.push([[Date.now()], {}, e => (wpRequire = e)]);
  const mods = Object.values(wpRequire.c);

  const {Store} = mods.find(m => m?.exports?.Store).exports;
  const {ApplicationStreamingStore, QuestsStore, UserStore} =
    Store.getAll().reduce((a, c) => ((a[c.getName()] = c), a), {});
  const {encodeStreamKey} = mods.find(m => m?.exports?.encodeStreamKey).exports;
  const {sendHeartbeat, enrollInQuest} = mods.find(
    m => m?.exports?.enrollInQuest
  ).exports;
  const Flux = UserStore._dispatcher;

  const printInstructions = () => {
    const quests = [...QuestsStore.quests.values()]
      .filter(
        q =>
          new Date(q.config.expiresAt) > new Date() &&
          !q.userStatus?.completedAt
      )
      .map(q => ({id: q.id, game: q.config.applicationName}));

    console.log(
      'Choose a quest from the list below. Copy the ID (not the index!) and complete it by running `await completeStreamQuest("18-digit-id-here")`'
    );
    console.table(quests);
  };

  const completeStreamQuest = async questId => {
    const quest = QuestsStore.getQuest(questId);
    if (!quest || !quest.config.streamDurationRequirementMinutes) {
      throw new Error('That quest does not exist or is invalid.');
    }

    if (!quest.userStatus) {
      console.log('Enrolling you in the quest');
      await enrollInQuest(questId, {
        questContent: 2,
        questContentCTA: 'ACCEPT_QUEST',
      });
    }

    const stream = ApplicationStreamingStore.getAnyStreamForUser(
      UserStore.getCurrentUser().id
    );

    if (!stream) {
      throw new Error('You are not streaming!');
    }

    const streamKey = encodeStreamKey(stream);
    console.log(
      `Starting the quest. This will take ${quest.config.streamDurationRequirementMinutes} minutes. Do not close this window until it has finished`
    );

    const progressFn = pl => {
      console.log(`Progress: ${pl.userStatus.streamProgressSeconds}/${quest.config.streamDurationRequirementMinutes * 60}`);
    };

    Flux.subscribe('QUESTS_SEND_HEARTBEAT_SUCCESS', progressFn);

    for (let i = 0; i < quest.config.streamDurationRequirementMinutes; i++) {
      await sendHeartbeat({questId, streamKey});
      await new Promise(r => setTimeout(r, 1000 * 60));
    }

    console.log('Done! Open your gift inventory to claim the reward.');
    Flux.unsubscribe('QUESTS_SEND_HEARTBEAT_SUCCESS', progressFn);
  };

  printInstructions();
  return {completeStreamQuest};
})();