I'm sorry that you are experiencing issues with the TabOnlineSyncClient. What is the data source? Did you review the documentation here? - Refreshing Data Using the Tableau Online Sync Client
Also, please open a ticket with Tableau Support so we can help you get setup and working. Support can be reached at http://support.tableau.com
Thanks for your reply.
My colleague figured out the answer.
On Tableau Desktop, you can use date as parameters on the SQL query.
However when you are trying to publish them on Tableau Online, the data source has some kind of glitch and is looking for something that it should not be looking, therefore creating the bug.
Putting the date in static with a date that goes back to 1980 with a filter, solve the issue.
But we still want to be able to publish online with date as parameters.
Have you ever heard of something simiilar?