Html page is not refreshing on Github

I host my currnet site on Github. Recently, I push my updated html files to Github, but I can not see any new update. I struggled more than an hour to figure out what causes the issue. Apparently, my site stop building when I push the code. The error does tell me there is symbol link issue on one of the html file. Here is the problem: I have found a dead symbol link in my html folder. Once I delete the dead symbol link, the problem goes away. I went to my repos(which hosts my html files, e.g. and click on Setting I found some errors in the Setting, here is the nice screenshot.