"ES6: Create Strings using Template Literals" is broken

In https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/es6/create-strings-using-template-literals, the first two tests pass but the third fail. I don’t understand why; I obviously use a template literal.

const result = {
  success: ["max-length", "no-amd", "prefer-arrow-functions"],
  failure: ["no-var", "var-on-top", "linebreak"],
  skipped: ["id-blacklist", "no-dup-keys"]
function makeList(arr) {
  "use strict";

  // change code below this line
  const resultDisplayArray = arr.map(str => `<li class="text-warning">${encodeURI(str)}</li>`);
  // change code above this line

  return resultDisplayArray;
 * makeList(result.failure) should return:
 * [ <li class="text-warning">no-var</li>,
 *   <li class="text-warning">var-on-top</li>, 
 *   <li class="text-warning">linebreak</li> ]
const resultDisplayArray = makeList(result.failure);

A lot of other people are currently having problems with passing this test,
see Create Strings using Template Literals - Invalid regular expression flags.
According to this thread, the devs seem to be aware of the problem.
I suggest that you skip this lesson for now and check the thread regularly to see whether the issue has been resolved.