Hey there ....
I'm using ARIS Enterprise (Aris Aware license), Below is the steps i followed to create Data-feeds and then Dashboard ...
a) I have created an excel with few rows and columns.
b) Uploaded excel inside ARIS DOCUMENT STORAGE(ADS) and copied link of excel.
c) Clicked on "Dashboard and Data-Feed" from left menu.
d) Clicked on "Data-Feed" ...then click on "+" button on Top-Right corner.
e) The i have selected "Excel" as data-feed option and pasted excel link.
f) Then i clicked on "setting" and enter my credential for authentication purpose.
f) Now i clicked on "Calculate" and the Data-Feed get calculated.
g) I have used above Data-Feed to create dashboard.
h) After creating dashboard , my Data-Feed go vanished/disappeared from Data-Feed list.
Attached is the snapshot for reference purpose .
Looking forward for guidance / support
Thanks.