Apache HTTPD fails to start due to syntax errors when loading modules

Issue

• Apache fails to start due to syntax errors when loading sm_module module:

  LoadModule sm_module "/Apache/webagent/bin/libmod_sm24.so"
  SmInitFile "/Apache/http//conf/WebAgent.conf"
  

• Apache fails to start due to syntax errors when loading dav_fs module

  server httpd[7020]:AH00526:syntax error on line 1 etc/httpd/conf.modules.d/dav_fs.conf
  

• Apache fails to start due to syntax errors when loading mod_proxy module

  AH00526: Syntax error on line 123 of /etc/httpd/conf/httpd.conf:
  Invalid command 'ProxyHCExpr', perhaps misspelled or defined by a module not included in the server configuration