When running the installation script it is trying to check permissions on /home/mysite/public_htmlconfig/ but it be /home/mysite/public_html/config/
This is currently stopping the installation going any further.
I suspect it is on line 408 of core/Config.php as there seems to be a preceding slash to config
$path = "config/" . basename($this->getLocalPath());
I tried updating the code but it is now telling me there is a integrity error as the file has been changed so I can't test it.
duplicates #8439, and should already be fixed in latest beta