When your Github Pages running Jekyll stops updating, how do you find the problem?
I didn't find anywhere that told you how to debug, only suggestions on what to fix. As seen in this thread, your Github website can fail to update for many reasons.
I tried reloading in a different browser to avoid caching issue, making sure --force_polling was after command: jekyll serve in one of the repo files, and renamed a file that was dated for the future. None of these worked.
Here's what I found that worked for me:
Under the Actions tab of your repository's main page, Github shows a log of deployments.
By clicking on the first unsuccessful deployment and then clicking on the part of the job with the red X, Github will tell you where to find the problem. In my case, I went to the _config.yml file and looked at line 2 as shown in the second image.
Then once you fix the error in the code, go back to Actions and click Re-run failed jobs.
