Hi… i am using Piwik 2.16.1… all data shows zero for the last month Feb 2021 alone… how can it be resolved…
I hope you are aware that this version has been released on 2016-04-11 and that there have been 47 Matomo releases since.
I would recommend you to look in your webservers error log.
Also check which PHP version you are using. Maybe it hasn’t already been released in 2016