[khaleds]

I’ve upgrade my PHP version to 7.1.8
Everything works just fine, only bbPress forum stopped working!
see the error in the debug:
PHP Fatal error: Uncaught Error: [] operator not supported for strings in /home/******/public_html/wp-content/plugins/bbpress/includes/forums/functions.php:1800
Stack trace:
#0 /home/******/public_html/wp-includes/class-wp-hook.php(298): bbp_pre_get_posts_normalize_forum_visibility(Object(WP_Query))
#1 /home/******/public_html/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array)
#2 /home/******/public_html/wp-includes/plugin.php(515): WP_Hook->do_action(Array)
#3 /home/******/public_html/wp-includes/class-wp-query.php(1683): do_action_ref_array(‘pre_get_posts’, Array)
#4 /home/******/public_html/wp-includes/class-wp-query.php(3248): WP_Query->get_posts()
#5 /home/******/public_html/wp-includes/class-wp.php(617): WP_Query->query(Array)
#6 /home/******/public_html/wp-includes/class-wp.php(735): WP->query_posts()
#7 /home/******/public_html/wp-includes/functions.php(955): WP->main(”)
#8 /home/******/public_html/wp-blog-header.php(16): wp()
#9 /home/******/public_htm in /home/******/public_html/wp-content/plugins/bbpress/includes/forums/functions.php on line 1800

[Robin W]

so 3 fixes
1. downgrade to a lesser version of php
2. upgrade to bbpress 2.6rc3
3. in bbpress 2.5.13 in includes/forums/functions.php
change line 1851 from
$meta_query = $posts_query->get( ‘meta_query’ );

to
$meta_query = $posts_query->get( ‘meta_query’, array() );

and change line 1796 from
$post_stati = $posts_query->get( 'post_status' );

to

$post_stati = $posts_query->get( ‘post_status’ ); 
if (!is_array($post_stati)){
                                             $post_stati = array($post_stati);
}

[khaleds]

I did the 2nd choice (upgrade to bbpress 2.6rc3) and it works just fine.
Thank you Robin