PHP Warnings/Notices

Anspress is generating the follow warnings:

Warning Illegal offset type in isset or empty 20 wp-content/plugins/anspress-question-answer/includes/functions.php:1159

Warning Illegal offset type in isset or empty 20 wp-content/plugins/anspress-question-answer/includes/functions.php:1161

And these notices:

Notice Undefined index: ap_sc_atts_tax_relation 1 wp-content/plugins/anspress-question-answer/includes/common-pages.php:44

Notice Undefined index: ap_sc_atts_tags_operator 1 wp-content/plugins/anspress-question-answer/includes/common-pages.php:47

Notice Undefined index: ap_sc_atts_categories_operator 1 wp-content/plugins/anspress-question-answer/includes/common-pages.php:50