Important issue

I can`t use my wordpress installation currently, because of this issue:

Fatal error: Cannot redeclare is_question_categories() (previously declared in /wp-content/plugins/anspress-question-answer/includes/functions.php:160) in /wp-content/plugins/categories-for-anspress/categories-for-anspress.php on line 568

Warning: in_array() expects parameter 2 to be array, boolean given in /wp-content/plugins/anspress-question-answer/includes/question-loop.php on line 489