You can refer to this blog tutorial
http://www.webuzo.com/blog/how-to/fix-internal-server-error-webuzo-2690.html

Hope this helps

[Wed Apr 08 09:22:29.434227 2015] [ssl:warn] [pid 675] AH01916: Init: (127.0.0.1:443) You configured HTTP(80) on the standard HTTPS(443) port!
[Wed Apr 08 09:22:29.528452 2015] [ssl:warn] [pid 676] AH01916: Init: (127.0.0.1:443) You configured HTTP(80) on the standard HTTPS(443) port!
[Wed Apr 08 09:22:29.528621 2015] [:notice] [pid 676] mod_ruid2/0.9.7 enabled
PHP Warning:  Module 'ctype' already loaded in Unknown on line 0
PHP Warning:  Module 'iconv' already loaded in Unknown on line 0
PHP Warning:  Module 'PDO' already loaded in Unknown on line 0
PHP Warning:  Module 'pdo_sqlite' already loaded in Unknown on line 0
PHP Warning:  Module 'sqlite3' already loaded in Unknown on line 0
PHP Warning:  Module 'tokenizer' already loaded in Unknown on line 0
[Wed Apr 08 09:22:30.228530 2015] [mpm_prefork:notice] [pid 676] AH00163: Apache/2.4.12 (Unix) OpenSSL/1.0.1k PHP/5.4.38 configured -- resuming normal operations
[Wed Apr 08 09:22:30.228625 2015] [core:notice] [pid 676] AH00094: Command line: '/usr/local/apps/apache2/bin/httpd'
Failed loading /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so:  /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so: cannot open shared object file: No such file or directory
Failed loading /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so:  /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so: cannot open shared object file: No such file or directory
Failed loading /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so:  /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so: cannot open shared object file: No such file or directory
Failed loading /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so:  /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so: cannot open shared object file: No such file or directory
Failed loading /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so:  /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so: cannot open shared object file: No such file or directory
Failed loading /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so:  /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so: cannot open shared object file: No such file or directory
Failed loading /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so:  /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so: cannot open shared object file: No such file or directory
Failed loading /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so:  /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so: cannot open shared object file: No such file or directory
[Wed Apr 08 09:24:11.387111 2015] [mpm_prefork:notice] [pid 676] AH00169: caught SIGTERM, shutting down
Failed loading /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so:  /usr/local/apps/php53/ext/ioncube_loader_lin_5.3.so: cannot open shared object file: No such file or directory
[Wed Apr 08 09:24:16.221550 2015] [ssl:warn] [pid 1042] AH01916: Init: (127.0.0.1:443) You configured HTTP(80) on the standard HTTPS(443) port!
[Wed Apr 08 09:24:16.285074 2015] [ssl:warn] [pid 1043] AH01916: Init: (127.0.0.1:443) You configured HTTP(80) on the standard HTTPS(443) port!
[Wed Apr 08 09:24:16.285199 2015] [:notice] [pid 1043] mod_ruid2/0.9.7 enabled
PHP Warning:  Module 'ctype' already loaded in Unknown on line 0
PHP Warning:  Module 'iconv' already loaded in Unknown on line 0
PHP Warning:  Module 'PDO' already loaded in Unknown on line 0
PHP Warning:  Module 'pdo_sqlite' already loaded in Unknown on line 0
PHP Warning:  Module 'sqlite3' already loaded in Unknown on line 0
PHP Warning:  Module 'tokenizer' already loaded in Unknown on line 0
[Wed Apr 08 09:24:16.395560 2015] [mpm_prefork:notice] [pid 1043] AH00163: Apache/2.4.12 (Unix) OpenSSL/1.0.1k PHP/5.4.38 configured -- resuming normal operations
[Wed Apr 08 09:24:16.395716 2015] [core:notice] [pid 1043] AH00094: Command line: '/usr/local/apps/apache2/bin/httpd'