In order to export AE animations that can be displayed in the Wallboard application, you will need the Bodymovin extension for After Effects.
You can get Bodymovin extension from the adobe store at the following URL: https://exchange.adobe.com/creativecloud.details.12557.html
You will find installation guide for the extension at the following URL: https://helpx.adobe.com/creative-cloud/kb/installingextensionsandaddons.html
Use the Bodymovin extension to export out your animation in Json format
Upload the exported Json file to the Wallboard system
Select the uploaded Json file for the Adobe widget and it will appear in the content.
You can also download animations from websites which host animations in Json format. For example site: https://lottiefiles.com/popular
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