Not able to opens website and control panel

Dear All,

Please help to sort out the issues, I am not able to open the website nor the admin control panel . I got following errors when I checked the logs:

[Sat Nov 25 03:30:06.146836 2017] [mpm_event:notice] [pid 18303:tid 140206453901184] AH00493: SIGUSR1 received.  Doing graceful restart
httpd: Syntax error on line 509 of /usr/local/apache/conf/httpd.conf: Syntax error on line 1 of /usr/local/apache/conf.d/mod_security.conf: Cannot load /usr/lib64/libxml2.so into server: /lib64/libm.so.6: symbol __strtold_nan, version GLIBC_PRIVATE not defined in file libc.so.6 with link time reference


Regards,