no more GUI after installing subsonic and owncloud plugins

[08:20:29] root@openmediavault:~$ omv-firstaid
Updating web administration settings. Please wait ...
{"response":null,"error":{"code":4000,"message":"Failed to execute command 'export LANG=C; nginx -t 2>&1': ngin                                                                                                x: [emerg] invalid number of arguments in \"proxy_set_header\" directive in \/etc\/nginx\/openmediavault-webgui                                                                                                .d\/sub.conf:4\nnginx: configuration file \/etc\/nginx\/nginx.conf test failed","trace":"exception 'OMVExceptio                                                                                                n' with message 'Failed to execute command 'export LANG=C; nginx -t 2>&1': nginx: [emerg] invalid number of arg                                                                                                uments in \"proxy_set_header\" directive in \/etc\/nginx\/openmediavault-webgui.d\/sub.conf:4\nnginx: configura                                                                                                tion file \/etc\/nginx\/nginx.conf test failed' in \/usr\/share\/openmediavault\/engined\/module\/webserver.inc                                                                                                :41\nStack trace:\n#0 \/usr\/share\/openmediavault\/engined\/rpc\/config.inc(180): OMVModuleNginxAbstract->appl                                                                                                yConfig()\n#1 [internal function]: OMVRpcServiceConfig->applyChanges(Array, Array)\n#2 \/usr\/share\/php\/openm                                                                                                ediavault\/rpcservice.inc(125): call_user_func_array(Array, Array)\n#3 \/usr\/share\/php\/openmediavault\/rpc.i                                                                                                nc(79): OMVRpcServiceAbstract->callMethod('applyChanges', Array, Array)\n#4 \/usr\/sbin\/omv-engined(500): OMVR                                                                                                pc::exec('Config', 'applyChanges', Array, Array, 1)\n#5 {main}"}}
Failed to execute RPC (service=Config, method=applyChanges)

[08:21:01] root@openmediavault:~$ service apache2 status
Apache2 is NOT running.
[13:58:07] root@openmediavault:~$ service apache2 start
Starting web server: apache2Syntax error on line 10 of /etc/apache2/openmediavault-webgui.d/default.conf:
Invalid command 'FcgidMaxRequestLen', perhaps misspelled or defined by a module not included in the server configuration
Action 'start' failed.
The Apache error log may have more information.
 failed!

[14:48:42] root@openmediavault:/etc/nginx/openmediavault-webgui.d$ service nginx restart
Restarting nginx: nginx: [emerg] invalid number of arguments in "proxy_pass" directive in /etc/nginx/openmediavault-webgui.d/sub.conf:4
nginx: configuration file /etc/nginx/nginx.conf test failed

location /subsonic {
proxy_pass        http://localhost:4040/subsonic
 #proxy_set_header  Host localhost:4040;
 proxy_set_header  Host ;
 proxy_redirect    default;
 }
  7