Please help us with this problem:
Fatal error: Uncaught Error: [] operator not supported for strings in /storage/h3/042/692042/public_html/wp-content/plugins/wp-discussion-board/includes/functions/functions-user.php:132 Stack trace: #0 /storage/h3/042/692042/public_html/wp-content/plugins/wp-discussion-board/includes/functions/functions-user.php(71): ctdb_get_permitted_viewer_roles() #1 /storage/h3/042/692042/public_html/wp-content/plugins/wp-discussion-board/includes/classes/class-ct-db-public.php(110): ctdb_is_user_permitted() #2 /storage/h3/042/692042/public_html/wp-includes/class-wp-hook.php(298): CT_DB_Public->check_user_permission('') #3 /storage/h3/042/692042/public_html/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #4 /storage/h3/042/692042/public_html/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #5 /storage/h3/042/692042/public_html/wp-settings.php(449): do_action('init') #6 /storage/h3/042/692042/public_html/wp-config.php(89): require_once('/storage/h3/042...') #7 /storage/h3/042/692042/public_html/wp-load.php in /storage/h3/042/692042/public_html/wp-content/plugins/wp-discussion-board/includes/functions/functions-user.php on line 132