After I upgraded piwik to 1.10.1, I get the following error on the login screen:
Error: You can't access this resource as it requires an view access for at least one website.
I am also including a screenshot of the page with the entire stack trace.
The instance of Piwik I am using is self hosted and I have been using the CAS plugin for login.
There is a discussion about this issue on the forum:
but no solution has been found so far. Since some of those affected who reported the same problem in the thread are not using the CAS plugin I suspect that CAS is not the cause. As some have mentioned in the thread, the error goes away if either PDFReports or MobileMessaging plugins is disabled. This is obviously not a long-term fix.
In 6dbc84e: Fixes #3769 Hiding backtrace on login form + error pages