We ran the one-click upgrade from the browser and it reported this issue:
PCLZIP_ERR_BAD_FORMAT (-10). Unable to find End of Central Dir Record Signature
Clicking continue let us know that a database upgrade was required. We ran that via the console and it worked fine.
No errors in the apache log.
The error message above stated Matomo One Click Update has been cancelled, but it looks like the upgrade actually went through. (About page says 3.6.0) I’m concerned it’s in some sort of partial state, or that some plugins may not have been upgraded
What archive didn’t get extracted here? Looks like maybe CustomReports 3.1.2?