Automated tests fail on Travis due to data-l10n-id not visible

[luixxiul]

Description

Automated tests fail on Travis due to data-l10n-id.

https://travis-ci.org/brave/browser-laptop/jobs/286524924#L3411

2) Regular payment panel tests can setup payments shows welcome page:
     Error: element ("[data-l10n-id="payments"]") still not visible after 10000ms
      at elements("[data-l10n-id="payments"]") - isVisible.js:54:17
      at isVisible("[data-l10n-id="payments"]") - waitForVisible.js:73:22

  3) Regular payment panel tests can setup payments payments can be enabled:
     Error: element ("[data-l10n-id="payments"]") still not visible after 10000ms
      at elements("[data-l10n-id="payments"]") - isVisible.js:54:17
      at isVisible("[data-l10n-id="payments"]") - waitForVisible.js:73:22

Additional Information

These errors are related with a npm package, because the same error happens on every PR of master branch which has once successfully finished, by restarting builds manually. Manual trials indicate that moment is a cause of the errors.