This is the error log file of the site in question:
[warn] (104)Connection reset by peer:mod_fcgid: read data from fastcgi server error.
[error] [client 18.104.22.168] Premature end of script headers: index.php
[warn] mod_fcgid: read data timeout in 40 seconds
[error] [client 22.214.171.124] Directory index forbidden by Options directive