PHP warnings after update to Piwik 3 and php 7.1

When I call the security info page, an message is shown, that I report here PHP warnings:
WARNING: /var/www/piwik/html/plugins/SecurityInfo/PhpSecInfo/Test/Test.php(389): Notice - A non well formed numeric value encountered - Piwik 3.0.0 - Please report this message in the Piwik forums: (please do a search first as it might have been reported already)

PHP 7.1 running in fpm mode.

Thank you for this. Would you mind creating a ticket in the tracker for this plugin here: Issues · matomo-org/plugin-SecurityInfo · GitHub

Created as