Can you please provide details of the error message.
As a simple test you should be able to connect the output of a Create Data node to the Output Tableau node and configure the node's OutputFilename property of the file path plus filename for the results file. Note: the folder where the output file will be written must exist.
Also, what version of the product are you using? You can get the details from the Help (i) button on the main menu and then select About Dataverse.
Thanks