It looks like you're trying to connect to a temporary file. If you have the excel workbook can you move it to your documents folder or desktop (i.e. an easily findable location) try creating the connection to the excel file again, then replacing the data source?
Let me know if that works,
I am also getting the same error but unable to find proper solution.
I have also tried to uninstall and install the Tableau again but getting same error. Also on another machine, I am able to create connection on excel file without any issue, so based on understanding it looks like a machine specific issue.
Can anyone please suggest anything?
I am able to resolve the issue after uninstalling Malware software installed on my machine which is blocking to use any file as a data source.