However, there is some troubleshooting you can do. Copy the discovery script to your clipboard and head over to the collectors page. Find the collector monitoring that device and open the debug command console. Then execute a !groovy command. This will prompt you to choose a device and input a script. Do that and when you run it you will see the raw output, which might give you an indicator of what is failing (because you see the raw output instead of just the "sorry i couldn't parse anything from the output" message).