And in msf.class.php same.
I fixed this problem by adding correct paths in msf-admin.class.php
148 line:
wp_register_script($this->_token . '-backend', esc_url($this->_assets_url) . 'scripts/msf-backend.min' . $this->_script_suffix . '.js', array('postbox', 'jquery-ui-dialog', 'jquery-ui-sortable', 'jquery-ui-draggable', 'jquery-ui-droppable', 'jquery-ui-tooltip', 'jquery'), $this->_version);
and 160 line
wp_register_style($this->_token . '-backend', esc_url($this->_assets_url) . 'styles/msf-backend.min' . $this->_script_suffix . '.css', array(), $this->_version);
You can fix this bug in next update. There is a problem with .min.js .
