I have a local installation in production mode. I added a new routed controller but when I browse to the respective URL I get a 500 error response. The controller method has obviously a bug, but how can I trace it? Doing "sudo openproject logs" shows a line reporting the error 500 event, but says nothing about its cause. Where can I get more detailed information about the origin of an error 500, that is, some kind of stack trace?