IssueWhen accessing a workbook for the second time, after it initially loads, the following error might occur:
Unknown Server Error
An unexpected error occurred. If you continue to receive this error please contact your Tableau Server Administrator.
throw DataSourceException (type=Unknown): LayeredProtocol::LayeredProtocol: Missing attribute\nUnable to connect to the file \"....". Check that the file exists and that you have sufficient access privileges for it.\n"}