I’m running the WordPress plugin connected to Matomo in Self-Hosted (PHP API) mode,
WP-Matomo 1.0.23 is successfully connected to Matomo 4.2.1. You are running WordPress 5.7.2.
In my server logs, I see a lot of warnings.
type E_NOTICE (8) info Undefined index: proxy_client_headers file /home/user/public_html/matomo/core/IP.php line 49
It seems to coincide with doing a GET request with query parameters, e.g.
Everything stills seems to work though, but it would be nice if there are isset() checks to avoid the warnings filling up people’s logs?