IssueWhen you try to create or refresh an extract, the following error might occur:
The connection to the data source might have been lost. Communication with the Tableau Protocol Server process was lost.
Note: Starting in Tableau 2019.1, you can no longer create a new Legacy Excel or Text connection. Existing workbooks created with these legacy connections will continue to work until 2019.2, when all support for legacy connections will be removed. See the Legacy Connection Alternatives document in Tableau Community for alternatives to using the legacy connection.