Looks like the host for the little ghost icon is down, the little ghost icon is missing and I can just make out a message that may say the file can't be found.

Hi,
upload your own image or take my dropbox example.
Open vanish.json in config folder and edit this line.

Icon URL (.png or .jpg)": "https://www.dropbox.com/s/q6xqfncvxla3f1k/ghost.png?dl=1",

omegablue

Hi,
upload your own image or take my dropbox example.
Open vanish.json in config folder and edit this line.

Icon URL (.png or .jpg)": "https://www.dropbox.com/s/q6xqfncvxla3f1k/ghost.png?dl=1",

Thanks, that is a good work around. 
I did want to report this here too in case they wanted to update their plug-in.