I don’t think Piwik does return 406 response codes, but to make sure there is no error, check the php error log.
It can also be a problem with the webserver or it’s configuration, so please also check its error log.
406 (Not Acceptable) means that the client is trying to request the information in a format (via the accept-header, so maybe check in the developer tools what header the request to index.php?action=getDashboardLayout is sending) the server can’t provide.
Hi,
While I think the plugins/.htaccess isn’t at fault here (the request isn’t in the plugins/ directory), I am happy you were able to solve your issue.