Since I updated to 3.13.2 I get the following message when I open the Administration tab:
WARNING: /var/www/matomo/core/Http.php(538): Notice - Trying to access array offset on value of type null - Matomo 3.13.4 - Please report this message in the Matomo forums: https://forum.matomo.org (please do a search first as it might have been reported already) (Module: Installation, Action: systemCheckPage, In CLI mode: false)
I am currently running at 3.13.4.
Also, my crontab for archiving doesn't work. I set it up as described in the documentation: https://matomo.org/docs/setup-auto-archiving/
Could that be linked to the warning message?
I appreciate your help. Thanks in advance!
Thanks for reporting this @Tim197 Very appreciated. Seems you're not getting a response from an HTTP request, and at the same time PHP doesn't give us an error which seems rather unusual. I supposed we'd need to trigger a generic error message there instead when this happens. There is definitely a bug in there.
The code hasn't been changed there in many years though. It might indicate something changed on your server or environment, or on the server the script is trying to reach.