The classmate died and changed the name of github’s own blog warehouse from XXX.github.io to something else and back again.
Then the blog page is 404.
In fact, I don’t know if this is the reason because the blog is still running normally at the original site as shown below the library settings.
In short, it is dead.
I don’t know if there is a solution.
1. Delete the warehouse on github
Gitpushorigin-delete warehouse name
2. Delete the local warehouse name
Gitbrand-d warehouse name
3. Reinitialize git
4. Re-create the warehouse name locally
Git branch warehouse name
5.push to github
Git push origin warehouse name
Update the blog file to github and it will be restored.