Well, -bezel/maddog/maddog.png makes no sense, so let's assume you meant :
-bezel /maddog/maddog.png
Which will not work unless you have the bezels in your root folder, you need to remove the leading /
-bezel maddog/maddog.png
If that doesn't work, then I'm just guessing. Unless you paste the whole log and show folder structure or go on Discord.