thomas2026

@zinoui

From my logs, this is what I see, which may be useful for you.

PHP Warning: Undefined variable $filename in …/wp-content/plugins/http-headers/http-headers.php on line 1493

PHP Warning: Cannot modify header information – headers already sent by (output started at …/wp-includes/script-loader.php:2428) in …/wp-includes/pluggable.php on line 1531

I am on WordPress 6.9.4 and PHP v8.3.30, Apache web server.
I upgraded your plugin from 1.19.2 to 1.19.4 when the issue happened.