I search previous Q&As and not find my solution.
centos7 + apache24 + php7 + 5.5.52MariaDB / and also MacOS + php7 +apache24 + mysqlnd 5.0.12
HTTP ERROR 500 when accessing OCS root path. But OJS and OMP successfully lead to installation.
I confirm that config.ini.php exists, file(folder) ownership is proper and set permission 777 to cache folder.
—The following is error log fro httpd, although I am not sure if it will be helpful. Error_log file from virtualhost setting shows nothing.
[Wed Jul 26 00:09:46.765891 2017] [suexec:notice] [pid 22382] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
AH00558: httpd: Could not reliably determine the server’s fully qualified domain name, using localhost.localdomain. Set the ‘ServerName’ directive globally to suppress this message
[Wed Jul 26 00:09:46.803850 2017] [auth_digest:notice] [pid 22382] AH01757: generating secret for digest authentication …
[Wed Jul 26 00:09:46.804906 2017] [lbmethod_heartbeat:notice] [pid 22382] AH02282: No slotmem from mod_heartmonitor
[Wed Jul 26 00:09:47.468022 2017] [mpm_prefork:notice] [pid 22382] AH00163: Apache/2.4.6 (CentOS) configured – resuming normal operations
[Wed Jul 26 00:09:47.468095 2017] [core:notice] [pid 22382] AH00094: Command line: ‘/usr/sbin/httpd -D FOREGROUND’
[Wed Jul 26 00:10:54.099941 2017] [mpm_prefork:notice] [pid 22382] AH00170: caught SIGWINCH, shutting down gracefully
[Wed Jul 26 00:10:55.158168 2017] [suexec:notice] [pid 22448] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
AH00558: httpd: Could not reliably determine the server’s fully qualified domain name, using localhost.localdomain. Set the ‘ServerName’ directive globally to suppress this message
[Wed Jul 26 00:10:55.173486 2017] [auth_digest:notice] [pid 22448] AH01757: generating secret for digest authentication …
[Wed Jul 26 00:10:55.173910 2017] [lbmethod_heartbeat:notice] [pid 22448] AH02282: No slotmem from mod_heartmonitor
[Wed Jul 26 00:10:55.199063 2017] [mpm_prefork:notice] [pid 22448] AH00163: Apache/2.4.6 (CentOS) configured – resuming normal operations
[Wed Jul 26 00:10:55.199077 2017] [core:notice] [pid 22448] AH00094: Command line: ‘/usr/sbin/httpd -D FOREGROUND’