Error: php deprecated auto-archiving

Hi there,
I’ve got this error (php issue? php 7.4.0)

WARNING: /var/www/…/piwik/core/DataTable/Filter/ColumnDelete.php(164): Deprecated - array_key_exists(): Using array_key_exists() on objects is deprecated. Use isset() or property_exists() instead - Matomo 3.13.0 - Please report this message in the Matomo forums: (please do a search first as it might have been reported already) (Module: API, Action: get, Method: API.get, In CLI mode: false)

Error: Empty or invalid response 'PHP Deprecates: Array and string offset access syntax with curly braces is deprecated in /var/www/…/piwik/libs/upgradephp/upgrade.php on line 180

Any ideas? Thx


While I did a lot of testing and changes in the last months to make sure Matomo is usable with PHP 7.4, it seems like a few things slipped through.

For the first warning I created a new issue:

The second one has been fixed with