[Hustle] Hustler does nothing

Hi there, after re-installing and re-activating Hustler, I can't do anything with the plugin. All I see is this screen (https://www.dropbox.com/s/3627t4pw8fch9hm/Schermafdruk%202018-11-28%2008.34.58.png?dl=0), and clicking on buttons has no results...
Your help is appreciated.

[edit]
And after re-activating I also notice that my statistics are blank also... (https://www.dropbox.com/s/5ba66fxyperrxny/Schermafdruk%202018-11-28%2008.43.19.png?dl=0)