hello,
i have checked your site and found that there is an obsolete version of wplms. please update your theme & plugins to its latest version.
refer: http://prntscr.com/orhlm9
after that, check: this could be a third party plugin which is causing code conflicts.
- Please deactivate all installed 3rd party plugins.
- Delete browsers cache especially cache plugin.
- Re-save permalinks.
maybe this is the third party plugin which is conflicting. if it does not work then let me know.