Warning - array_merge(): Expected parameter 1 to be an array, null given - Matomo 4.1.1
(when running ./console core:archive)
@datango Are you using any scheduled reports? Can you clicking the 'Send report now' link for each on the 'Email Reports' admin page to find which one is causing this error?
Can you also provide the core:archive output?
And can you let us know if you're using matomo from git or are installing composer dependencies yourself?