Bug when activate membership2 condition in popup pro

HI

I ve got un issue in popup pro

when activate membership2 condition in popup pro, got an error message :

" Warning: Missing argument 2 for apply_filters(), called in /home/aasso/www/wp-content/plugins/popover/inc/rules/class-popup-rule-protectedcontent.php on line 59 and defined in /home/aasso/www/wp-includes/plugin.php on line 177 "

Best regard
Fred