tableau online show the message below
....... (Mobile) is out of date
Data Source: Embedded
Suspended Status: Failed 5 consecutive times: Sign in Failed
Refresh Failed: Date......
Last Refresh: Not in the last 14 days
Resolution Details: Check the Data Connection page for necessary update
to an access token or embedded credentials.
I would like to know that why these keep failing as well as how to fix it.
The error message tells you what is wrong and what you need to do: Verify that the credentials being used are valid and that the access token is current.