When connecting to Anaplan, the connection dialog is blank and users are unable to enter any connection information.
Tableau Desktop needs to access https://connectors.tableau.com:443 to retrieve Anaplan connection page before connecting to Anaplan.
The connection fails if the access is restricted by a proxy server.
1. Ensure your proxy server allows traffic for https://connectors.tableau.com:443.
2. Ensure your proxy server does not need manual authentication for connecting to https://connectors.tableau.com:443.
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