It seems like our Matomo system suddenly has problems connecting to Matomo home.
If I enter the system with the admin user almost every click takes 1 minute to respond. I thought of a major problem but when I logged in as a standard user everything seems to work fine. But if I enter the Administration menu of the standard user I see three widgets showing “Loading data…” and after a while the widget “Matomo.org Blog” shows:
Oops… there was a problem during the request. Maybe the server had a temporary issue, or maybe you requested a report with too much data. Please try again. If this error occurs repeatedly please contact your Matomo administrator for assistance. - Error while importing feed: /var/www/piwik/core/Http.php(554): Warning - file_get_contents(https://matomo.org/feed/): failed to open stream: Connection timed out - Matomo 4.1.1 - Please report this message in the Matomo forums: https://forum.matomo.org (please do a search first as it might have been reported already)
I used curl from the console to check if https://matomo.org/feed/ is reachable from this machine. It is.
After that I checked if PHP get_headers gets the data and this works, too.
Matomo is version 4.1.1, PHP is 7.4.3 and the system check tells me that the system is fine.
What can I try to find the source of this problem?