maybe it is random 503 errors, or related to that user.
try to follow the instructions in our wiki for trouble shooting.
If you LiteSpeed PHP setup give 503 errors, you may have PHP configuration problem, usually it is because the version of a loadable module does not match the PHP version used. You need to recompile the loadable module to fix it.
Some trouble shooting techniques:
check lsws/logs/stderr.log and lsws/logs/error.log.
try to start the lsphp binary with matching user id with command like
sudo -u nobody ./lsphp5 -i
compare the phpinfo() page to a working installation, sometimes, due to permission problem, php configuration files cannot be fully loaded.
strace/truss/ktrace a lsphp process, it shows all the system calls made by the process.