Events+ getting error 500

Hello,

Since I installed Events + I am getting 500 error, I have activated debug mode and this error came up:

Fatal error: Call to a member function is_main_query() on a non-object in /home/sites/tmtpr.ro/public_html/wp-content/plugins/events-and-bookings/lib/default_filters.php on line 122

Please advise!

Thank you!