Problem going after step 8 Shortest Path lesson

Progress stops at 30% at end of step 8 Implement the Shortest Path lesson. I have tried refreshing the page and closing the browser,no luck. After clicking ‘Submit and continue’ the progress bar starts, but stops at 30%. This is not a problem with my code, it seems a system issue

If you have a question about a specific challenge as it relates to your written code for that challenge and need some help, click the Help button located on the challenge.

The Help button will create a new topic with all code you have written and include a link to the challenge also. You will still be able to ask any questions in the post before submitting it to the forum.

Thank you.

This is not about my code. It is about the software backing up this course. My code is correct for step 8, The interface is frozen,

Please try one of the following steps to move forward.

Click on the “Restart Step” button and force a refresh of your page with CTRL + F5 then try to paste the code in again.

or - Try the step in incognito or private mode.

or - Disable any/all extensions that interface with the freeCodeCamp website (such as Dark Mode, Ad Blockers, or Spellcheckers), and set your browser zoom level to 100%. Both of these factors can cause tests to fail erroneously.

or - Ensure your browser is up-to-date or try a different browser.

I hope one of these will work for you.

Thanks. The first one worked. I am saving this for future needs.
Del