Full screen option not working

/Applications/Utilities/DEPNotify.app/Contents/MacOS/DEPNotify -fullscreen Waiting for the Dock 2018-04-23 21:33:18.808 DEPNotify[2982:117740] Unknown Window class (null) in Interface Builder file, creating generic Window instead 2018-04-23 21:33:18.820 DEPNotify[2982:117740] Failed to set (backgroundColor) user defined inspected property on (DEPNotify.ViewController): [<DEPNotify.ViewController 0x7fa393f2cad0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key backgroundColor. 2018-04-23 21:33:18.820 DEPNotify[2982:117740] Failed to set (keyPath) user defined inspected property on (DEPNotify.WindowController): [<DEPNotify.WindowController 0x7fa393f2b0d0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key keyPath. Reticulating splines... Change observed Reticulating splines... tail: : No such file or directory

This is what I am seeing when testing the -fullscreen option. System this is running on: MacBook Pro 15" 2017 OS X is Sierra 10.12.6 (16G1212)