Conflict with WPML trigger ajax not functioning

There is a conflic issue between Query Monitor and WPML plugin, as stated in my debug.log: “PHP Fatal error: Uncaught Error: Call to a member function get_requested_lang() on null in xxx/public_html/wp-content/plugins/sitepress-multilingual-cms/sitepress.class.php:1135” and the error trace shows: “11 /public_html/wp-content/plugins/query-monitor/classes/Util.php(246): __(‘WordPress Core’, ‘query-monitor’)

12 /public_html/wp-content/plugins/query-monitor/classes/Backtrace.php(283): QM_Util::get_file_component(‘/home3/houno/pu…’)

13/public_html/wp-content/plugins/query-monitor/classes/Backtrace.php(214): QM_Backtrace::get_frame_component(Array)

14/wp-content/plugins/query-monitor/collectors/php_errors.php(275): QM_Backtrace->get_component()

15 [internal function]: QM_Collector_PHP_Errors->error_handler(8, ‘unserialize(): …’, ‘/pu…’, 650)

….

32 /public_html/wp-admin/admin-ajax.php(22): require_once(‘/home3/houno/pu…’)

33 {main}

thrown in /home3/houno/public_html/wp-content/plugins/sitepress-multilingual-cms/sitepress.class.php on line 1135″

This error causes any filters or paginations on my site by using ajax to render content is not functioning at all. The entire site is just in loading mode infinitively. When I disabled the Query Monitory plugin, then the filters and paginations work as normal. Any suggestion to fix this problem? I need this plugin for my development site, which is a 100% mirror site of my production site.

Thanks