Fatal error: Uncaught Error: [] operator not supported for strings in C:\www\htdocs\wp-content\plugins\bbpress\includes\forums\functions.php:1800 Stack trace: #0 C:\www\htdocs\wp-includes\class-wp-hook.php(298): bbp_pre_get_posts_normalize_forum_visibility(Object(WP_Query)) #1 C:\www\htdocs\wp-includes\class-wp-hook.php(323): WP_Hook->apply_filters('', Array) #2 C:\www\htdocs\wp-includes\plugin.php(515): WP_Hook->do_action(Array) #3 C:\www\htdocs\wp-includes\class-wp-query.php(1680): do_action_ref_array('pre_get_posts', Array) #4 C:\www\htdocs\wp-includes\class-wp-query.php(3245): WP_Query->get_posts() #5 C:\www\htdocs\wp-includes\class-wp.php(619): WP_Query->query(Array) #6 C:\www\htdocs\wp-includes\class-wp.php(737): WP->query_posts() #7 C:\www\htdocs\wp-includes\functions.php(955): WP->main('') #8 C:\www\htdocs\wp-blog-header.php(16): wp() #9 C:\www\htdocs\index.php(17): require('C:\\www\\htdocs\\w...') #10 {main} thrown in C:\www\htdocs\wp-content\plugins\bbpress\includes\forums\functions.php on line 1800