We have created a "contacts" data extension. Have three fileds, an ID (subscriber key), mobile number and locale.
We need to import these contacts to use them in SMS in automation studio.
To do this, we have created an Import Definition in Mobileconnect. This defines the conctacts data extension like source and a list created like target.
In automation studio we have used "Import Mobile Contacs" activity, that uses this Import Definition.
But when we run the automation, we receive an error.