Here is how to fix the following error: Connection to [/tmp/lshttpd/lsphp5.sock] on request #0, confirmed, 0, associated process: -1, running: 0, error: Connection reset by peer!
error_log:
2021-01-28 10:05:51.751 [INFO] [lsphp5] PID: 45143, add child process pid: 45175, procinfo: 0x15656f0
2021-01-28 10:05:51.790 [INFO] Remove pid: 45175, exitcode: 255
2021-01-28 10:05:51.790 [INFO] [66.249.64.1:14152-0#APVH_lsws.com] connection to [/tmp/lshttpd/lsphp5.sock] on request #0, confirmed, 0, associated process: -1, running: 0, error: Connection reset by peer!
2021-01-28 10:05:51.791 [INFO] [lsphp5] PID: 45143, add child process pid: 45177, procinfo: 0x15656f0
2021-01-28 10:05:51.829 [INFO] Remove pid: 45177, exitcode: 255
2021-01-28 10:05:51.829 [INFO] [66.249.64.1:14152-0#APVH_lsws.com] connection to [/tmp/lshttpd/lsphp5.sock] on request #0, confirmed, 0, associated process: -1, running: 0, error: Connection reset by peer!
2021-01-28 10:05:51.831 [INFO] [lsphp5] PID: 45143, add child process pid: 45179, procinfo: 0x15656f0
2021-01-28 10:05:51.869 [INFO] Remove pid: 45179, exitcode: 255
2021-01-28 10:05:51.869 [INFO] [66.249.64.1:14152-0#APVH_lsws.com] connection to [/tmp/lshttpd/lsphp5.sock] on request #0, confirmed, 0, associated process: -1, running: 0, error: Connection reset by peer!
2014-01-28 10:05:51.869 [NOTICE] [66.249.64.1:14152-0#APVH_lsws.com] Max retries has been reached, 503!
2014-01-28 10:05:51.869 [NOTICE] [66.249.64.1:14152-0#APVH_lsws.com] oops! 503 Service Unavailable^M
strderr.log:
2021-01-28 10:05:51.789 [STDERR] PHP Fatal error: Directive 'register_globals' is no longer available in PHP in Unknown on line 0
2021-01-28 10:05:51.828 [STDERR] PHP Fatal error: Directive 'register_globals' is no longer available in PHP in Unknown on line 0
2021-01-28 10:05:51.867 [STDERR] PHP Fatal error: Directive 'register_globals' is no longer available in PHP in Unknown on line 0
Simply open the php.ini file and remove the bad directive (in my case register_globals) or comment it out.