[Observium] No valid device specified

First time I've run into this issue...

I added a device. It shows up fine in the device hitlist. But when I click on the device name for details I get:

"No valid device specified A valid device was not specified in the URL. Please retype and try again."

Any idea why this would be occurring? No way to delete/readd the device too because of this. Any help appreciated!

- John