hello
I have différents errors of plugin How to resolve tem Thank you 
Version de Matomo: 5.10.1
Version de MySQL: 10.6.21-MariaDB
Version de PHP: 8.3.16
These are PHP 8.x deprecation notices, not real errors and not a database/MySQL problem. They’re all emitted by one third-party plugin RerIntranetSubnetwork (a community plugin by Regione Emilia-Romagna), which uses pre-PHP-8.2 coding patterns. On your PHP 8.3.16 they’re harmless noise today, but they’ll become fatal errors on PHP 9.0 which could be released in 2027 at the earliest but since no date is announced, possibly later.
One important thing: the “Please report this message in the Matomo forums” text is generic boilerplate that Matomo’s deprecation logger appends to every deprecation, no matter who caused it. Here the cause is a third‑party plugin, so the Matomo core team won’t fix it. Reporting it to the RegioneER GitHub repo (https://github.com/RegioneER/RerIntranetSubnetwork) is the right move.
thank you so much for your answer
Hi, it looks like you’re getting several deprecation warnings rather than a complete failure. Could you share your PHP version and let us know if these messages appeared after a Matomo update? That information will make it easier for others to help identify whether it’s a compatibility issue with the current plugin or server setup.
If the warning only appeared after updating Matomo, I’d first identify which Core plugin is mentioned in the message and check whether it’s a known compatibility issue. A lot of these “WARNING: /core/…” or “WARNING: /plugins/…” messages are triggered by newer PHP versions exposing deprecated behavior rather than an actual database problem. Updating Matomo to the latest patch release and making sure all official plugins are on matching versions is usually the first thing to try.
It’s also worth checking Diagnostics in the Matomo admin panel and reviewing the Matomo logs to see whether the warning is cosmetic or actually affecting tracking or archiving. If everything else is working normally, it may simply be a bug that has already been reported and fixed in a newer release.In the rare case the database is corrupted and the built-in recovery methods don’t help, Stellar Repair for MySQL is a simple option to recover tables and data. Otherwise, this is more likely a Matomo application issue than a database one.
One additional thing I’d check is the server error log alongside the Matomo log. If the warning started after a PHP or Matomo update, it can help identify whether it’s coming from a specific plugin or a compatibility change. If tracking and archiving are still working normally, it may be a warning that can be resolved with a plugin or version update rather than a critical issue.