"Uncaught InvalidCharacterError" When Connecting to Anaplan

Published: 07 Oct 2021
Last Modified Date: 18 Oct 2021


When trying to sign in using certificate authentication in the Anaplan connector, the following error may occur:

An error occurred while communicating with the data source
The web data connector has reported an unrecoverable error and cannot proceed. If the connector has reported details of the error, they are displayed in the pane below.
Error Code: 82BE0673
Uncaught InvalidCharacterError: Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded.  stack:Error: Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded.
  at Object.base64DecodeUnicode (
  at Object.getBasicAuthString (
  at Object.ajax (
  at Object.getAuthToken (
  at n.<anonymous> (
  at HTMLButtonElement.r (
  at HTMLUListElement.dispatch (
  at HTMLUListElement.r.handle (


  • Tableau Desktop
  • Anaplan


Ensure that the certificate file is in the DER encoded binary X.509 format.

To convert a PEM encoded certificate file to DER encoded binary X.509 format on a Windows computer, use the following steps:
  1. Double-click on the certificate file to open it.
  2. Navigate to the Details tab, and click on Copy to File.
  3. Click Next.
  4. Ensure that "DER encoded binary X.509 (.CER)" is selected.
  5. Click Next, and specify a valid file name.
  6. Click Next, review the summary, and then click Finish.
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