Error "Cannot connect to Tableau Server... Internet communication error: Couldn't connect to server"

Published: 02 Jun 2021
Last Modified Date: 04 Jun 2021


With an exception entered for a Tableau Server instance under LAN settings in Internet Options, the following error may occur when connecting to Tableau Server in Tableau Desktop:

Unable to complete action
Cannot connect to Tableau Server. Please check the server name and port and try again.
Error Code: 9F4C5638
Internet communication error: Couldn't connect to server (
<server address>).


  • Tableau Desktop on Windows
  • Tableau Server


To troubleshoot this issue, ensure that only the server name is entered in the list of addresses for exception when using the proxy.

For example, instead of: 



Tableau Desktop does not support the inclusion of the protocol in values entered when configuring proxy exceptions.
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