Page couldn't be reached
I followed the steps in your website. After I forked the repository, I didn't make any changes to the content yet. After I edited Github Pages setting 'Source' -> 'Master branch', the page loaded with the default domain name is a plain text page shown in the picture

After I changed my custom domain, the site cannot be reached. I would like to know how to solve this issue, thank you!
You already said your problem
I didn't make any changes to the content yet.
For this theme to work you need to perform some minor changes in the _config.yml file, this links myth help you: https://jarrekk.github.io/Jalpc/html/2017/01/31/3-steps-to-setup-website-with-Jalpc.html and https://github.com/jarrekk/Jalpc/issues/120
Please be free to ask any questions
Regards, Tiago F. Fernandes