An error occurred – session already started

Hi @anphex thanks for letting us know and for the output of the diagnostics report. I could reproduce it and in this case it was caused by the simple ajax chat plugin. The problem was on our side though and I have prepared a fix in https://github.com/matomo-org/wp-matomo/pull/304/files

I don’t know how familiar you are with PHP and editing files but you could try and apply the same change to your file in wp-content/plugins/matomo/app/libs/Zend/Session.php and then it should work. The next release will also include this fix.

BTW I noticed in your logs there is also an archiving issue. It looks like PHP-CLI has no MySQL available. You could likely fix this issue as described here: https://matomo.org/faq/wordpress/how-do-i-fix-the-error-your-php-installation-appears-to-be-missing-the-mysql-extension-which-is-required-by-wordpress-in-matomo-system-report/

Thank you. This edit solved the issue. And thank you for the suggestion for fixing the archive. I will look right into it ??