Did you follow the module installation / troubleshooting instructions regarding Atlas?
2 - If you are receiving an error while using the module about: `Can't find stylesheet to import` or no styles are being applied please install Atlas UI 3 module from the AppStore and download this file (https://github.com/mendix/widgets-resources/releases/download/v3.0.0-beta1/theme.zip) and unzip it into your project folder. If you have custom styles, follow the new atlas structure to keep it working. 3 - If you are using Atlas 2.x, please replace the line 3 with the following code in the file theme/settings.json: "cssFiles": [ "styles/web/css/main.css", "theme.compiled.css" ],
Looks like a astyling issue to me.