This code is for delete all the tweets of your profile

Twitter: Delete tweets

/**
 * This code work in the https://mobile.twitter.com/YOUR_USERNAME/with_replies
 * 
 */
const _this = $;
const clickFirstElement = () => {
  _this(
    ".css-18t94o4.css-1dbjc4n.r-1777fci.r-11cpok1.r-1ny4l3l.r-bztko3.r-lrvibr"
  ).click();
  setTimeout(() => {
    deleteElement();
  }, 1000);
};

const deleteElement = () => {
  _this(
    ".css-1dbjc4n.r-1loqt21.r-18u37iz.r-779j7e.r-23eiwj.r-o7ynqc.r-6416eg.r-13qz1uu"
  ).click();
  setTimeout(() => {
    confirmDelete();
  }, 1500);
};

const confirmDelete = () => {
  _this(
    ".css-18t94o4.css-1dbjc4n.r-1dgebii.r-42olwf.r-sdzlij.r-1phboty.r-rs99b7.r-16y2uox.r-1w2pmg.r-145lgeb.r-9u3a9d.r-1fneopy.r-o7ynqc.r-6416eg.r-lrvibr"
  ).click();
  setTimeout(() => {
    window.scrollBy(0, 300);
    clickFirstElement();
  }, 3000);
};

clickFirstElement();

I get this error in Chrome 83.0.4103.97 on https://twitter.com/heide/with_replies. I am logged in to Twitter and all of my Chrome extensions are disabled. Hope this helps!

VM2170:14 Uncaught TypeError: Cannot read property 'click' of null
    at deleteElement (<anonymous>:14:4)
    at <anonymous>:7:5

This gist hard coded the fixed div selector classes that do not match the obfuscated changing REACT UI that matches widely other things breaking the execution chain running as infinite recursion to itself. My gist uses data selectors that should stay more consistent around among other things, try this:
https://gist.github.com/FocusWho/5a8e74895293eae0071cec612477c72f

/**
 * This code work in the https://mobile.twitter.com/YOUR_USERNAME/with_replies
 * 
 */
const _this = $;
const clickFirstElement = () => {
  _this(
    ".css-18t94o4.css-1dbjc4n.r-1777fci.r-11cpok1.r-1ny4l3l.r-bztko3.r-lrvibr"
  ).click();
  setTimeout(() => {
    deleteElement();
  }, 1000);
};

const deleteElement = () => {
  _this(
    ".css-901oao.r-daml9f.r-1qd0xha.r-a023e6.r-16dba41.r-ad9z0x.r-bcqeeo.r-qvutc0"
  ).click();
  setTimeout(() => {
    confirmDelete();
  }, 1500);
};

const confirmDelete = () => {
  _this(
    ".css-901oao.r-1awozwy.r-jwli3a.r-6koalj.r-18u37iz.r-16y2uox.r-1qd0xha.r-a023e6.r-b88u0q.r-1777fci.r-ad9z0x.r-dnmrzs.r-bcqeeo.r-q4m81j.r-qvutc0"
  ).click();
  setTimeout(() => {
    window.scrollBy(0, 300);
    clickFirstElement();
  }, 3000);
};

clickFirstElement();

try https://stackoverflow.com/a/71333246/6798139