I cannot understand why this happens?
On https://matomo.org/docs/requirements/ I see
PHP version 5.5.9 or greater
PS! PHP 5.6.40
Hi @Globulopolis. Matomo 3.13.6 still works with PHP 5.5. We will increase the requirement to PHP 7.2.5 with the release of Matomo 4. You already see the warning message so you are aware the next major release (Matomo 4) won't run on that system.
Did you hit the
check for updates button?
Oh, sorry, maybe my fault, or something with caching.