Every single widget shows this error. Whats crazy is that the comes and goes…sometimes, the Matomo data displays fine, and as of late, it doesn’t. More often then not, I come to the site and all widgets display this error. I have an on-premise version of Matomo setup that has worked since I installed it approx 2 months ago…its just recently started to not display data. Help…
Can you check the PHP error log (or your webserver error log) to see if there are any errors?
You could also check the tmp/logs/matomo.log in your Matomo directory.
Does the error show up immediately or after loading for quite some time (indicating that the server run time reaches a timeout)