Matomo for WordPress related DB errors may become visible in the user interface should for example WP_DEBUG be enabled. Here is what such errors might look like:

Matomo for WordPress DB Error Message

You can force the suppression of DB errors by adding the following line to your wp-config.php:

define('MATOMO_SUPPRESS_DB_ERRORS', true);

Most DB notices can be ignored in Matomo for WordPress as we’d detect them and work around them.