Local EmonCMS unresponsive

I’ve had an EmonPi for a couple of weeks now, and the metering side of things works fine.
I do have issues with EmonCMS however. The web server seems to be unresponsive most of the time. I know I have the correct IP address (I use the one displayed on the LCD screen, which has been reserved on the router as well).

Most of the time, when I try to access it (http://), I get a timeout in the browser (regardless of browser). Restarting the EmonPI doesn’t even solve the issue.

I’ve also tried connecting via Ethernet (rather than just WiFi), rebooted, and tried connecting through that IP, but again, nothing…

Is there a way to troubleshoot this?