WP-optimize suggets BBPress could be concerned.
So I change page with BBPress shortcode into a comment and I’ve desactivated BBPress. Today at same time I can read this in php-errors.log:

[28-Feb-2026 13:08:58 UTC] PHP Deprecated: La fonction seems_utf8 est obsolte depuis la version 6.9.0! Utilisez wp_is_valid_utf8() la place. in /xxx/wordpress/wp-includes/functions.php on line 6131
[28-Feb-2026 13:09:50 UTC] PHP Warning: Undefined array key “edit-page” in /xxx/wordpress/wp-content/plugins/ionos-essentials/ionos-essentials/inc/dashboard/blocks/next-best-actions/class-nba.php on line 110
[28-Feb-2026 15:46:51 UTC] PHP Notice: Function is_search was called incorrectly. Conditional query tags do not work before the query is run. Before then, they always return false. Please see Debugging in WordPress for more information. (This message was added in version 3.1.0.) in /xxx/wordpress/wp-includes/functions.php on line 6131
[28-Feb-2026 15:46:51 UTC] PHP Notice: Function is_404 was called incorrectly. Conditional query tags do not work before the query is run. Before then, they always return false. Please see Debugging in WordPress for more information. (This message was added in version 3.1.0.) in /homepages/22/d4298730425/htdocs/wordpress/wp-includes/functions.php on line 6131
[28-Feb-2026 15:46:51 UTC] PHP Notice: Function is_feed was called incorrectly. Conditional query tags do not work before the query is run. Before then, they always return false. Please see Debugging in WordPress for more information. (This message was added in version 3.1.0.) in /homepages/22/d4298730425/htdocs/wordpress/wp-includes/functions.php on line 6131
[28-Feb-2026 15:46:51 UTC] Erreur dvnement de dplanification de tche pour le crochet extendify_fetch_partner_data. Code derreur:could_not_set. Message derreur:La liste des vnements planifis na pas pu tre sauvegarde.. Donnes:{“schedule”:false,”args”:[]}

No fatal error with BBPress desactivated.
A surprise with cron task extendify not listed in cron task.
The only paused one is userfeedback_usage_tracking_cron, but no userfeedback plugin install, maybe linked jetpack (desinstalled) or MonsterInsights.
Or linked with Ionos Hosting as he is mentionned in first warning with Ionos-essentials.

Every day at same time, I can read PHP fatal error, concerned with 2 plugins:

BBPress for a forum with very few articles and comments,

WP-Optimize, for page cache and image compression.

No idea where it comes from. No cron at that time.

Every thing is up to date: WP6.9.1 PHP 8.3.30, all plugins with automatic update.

Thank in advance for helping

Didier

[26-Feb-2026 15:46:52 UTC] PHP Notice: Function is_search was called incorrectly. Conditional query tags do not work before the query is run. Before then, they always return false. Please see Debugging in WordPress for more information. (This message was added in version 3.1.0.) in /xxx/wordpress/wp-includes/functions.php on line 6131
[26-Feb-2026 15:46:52 UTC] PHP Fatal error: Uncaught Error: Call to a member function get() on null in /xxx/wordpress/wp-includes/query.php:29
Stack trace:

0 /xxx/wordpress/wp-content/plugins/bbpress/includes/common/template.php(2204): get_query_var()

1 /xxx/wordpress/wp-content/plugins/bbpress/includes/common/template.php(2193): bbp_get_query_name()

2 /xxx/wordpress/wp-content/plugins/bbpress/includes/common/template.php(891): bbp_is_query_name()

3 /xxx/wordpress/wp-content/plugins/wp-optimize/cache/file-based-page-cache-functions.php(376): bbp_is_search()

4 /xxx/wordpress/wp-content/plugins/wp-optimize/cache/file-based-page-cache-functions.php(1003): wpo_restricted_cache_page_type()

5 /xxx/wordpress/wp-content/plugins/wp-optimize/cache/class-wpo-page-cache.php(206): wpo_can_serve_from_cache()

6 /xxx/wordpress/wp-content/plugins/wp-optimize/includes/class-wpo-page-optimizer.php(54): WPO_Page_Cache->should_cache_page()

7 /xxx/wordpress/wp-content/plugins/wp-optimize/includes/class-wpo-page-optimizer.php(39): WPO_Page_Optimizer->maybe_cache_page()

8 [internal function]: WPO_Page_Optimizer->optimize()

9 /xxx/wordpress/wp-includes/functions.php(5481): ob_end_flush()

10 /xxx/wordpress/wp-includes/class-wp-hook.php(341): wp_ob_end_flush_all()

11 /xxx/wordpress/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()

12 /xxx/wordpress/wp-includes/plugin.php(522): WP_Hook->do_action()

13 /xxx/wordpress/wp-includes/load.php(1308): do_action()

14 [internal function]: shutdown_action_hook()

15 {main}

thrown in /xxx/wordpress/wp-includes/query.php on line 29

However, I checked the bbp style pack plugin on WordPress.org and it doesnt add email notification functionality to admins it mainly adds styling options and display features for bbPress, not admin notifications.

Do you know if we should use something like:

bbPress Notify (No-Spam), a dedicated plugin that actually sends emails to site admins when new topics or replies are posted?

Thanks again!

Install

bbp style pack

once activated go to

dashboard>settings>bbp style pack>moderation

for how to set this up

Were using bbPress on a WordPress site and weve noticed that the forum administrator is not receiving email notifications when someone creates a new topic or replies to an existing one.

Heres what were seeing:
WordPress email is working fine were using SMTP and other emails are being delivered correctly.
Users who subscribe to forums or topics do receive notifications with no issues.
The only problem is with the forum administrator / super admin, who does not receive any notification emails at all.

Environment:
WordPress: 6.9
bbPress: 2.6.14

Our questions:
1. Does bbPress send notifications to administrators automatically?
2. Is there a specific role, setting, or filter we should enable so administrators receive all notifications?

We need the admin to be notified so they can reply within 24 hours, but without email notifications this becomes difficult.

Any help or guidance would be much appreciated thank you!