I just use Piwik and I found in: Diagnostic >SystemCheck the following warning:
There are some issues with your system. Piwik will run, but you might experience some minor problems. See below for more information.
Below I found the following:
Other functions shell_exec
You need to enable this built-in function.
I’ve searched some, but I cannot find where I can enable this build-in function.
Who does know where I can enable it.