Hi Saovry,
I have applied a temporary fix on all of the following files on your site and the menu should work correctly now. We are still investigating the issue since we are not entirely sure if Joomla itself is at fault here or EasySocial. If it is the latter, hopefully, we can come up with a proper fix for the next release of EasySocial.
## Modified Files ##
administrator/components/com_easysocial/themes/default/marketplaces/default/default.php
administrator/components/com_easysocial/themes/default/pages/default/default.php
administrator/components/com_easysocial/themes/default/pages/form/members.php
administrator/components/com_easysocial/themes/default/events/default/default.php
administrator/components/com_easysocial/themes/default/events/form/members.php
administrator/components/com_easysocial/themes/default/users/default/default.php
administrator/components/com_easysocial/themes/default/groups/default/default.php
administrator/components/com_easysocial/themes/default/groups/form/members.php
administrator/components/com_easysocial/themes/default/html/form/iconpicker.php
administrator/components/com_easysocial/themes/default/settings/form/default.php