Don't post screenshots of text! That is very unhelpful. When you encounter an error you'll see a button on the right side of the orange bar "Copy error messages". Click that button. Paste the error in a message here USING CODE TAGS (</> button on the toolbar). It is almost never appropriate to post screenshots but in some cases it is helpful to post images. You should attach and embed the image following these instructions:
http://forum.arduino.cc/index.php?topic=364156
The problem is you need to install the Cayenne library. It available in Library Manager so this is very easy. Do this:
- Sketch > Include library > Manage libraries...
- Wait for download to finish
- In the "Filter your search by..." box, type: "cayenne".
- Click on "Cayenne by myDevices"
- Click "Install"
- Wait for installation to complete
- Click "Close"