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Salesforce Connector unable to retrieve access token

  • April 14, 2026
  • 1 reply
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londonwalker
Observer
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I have been following this article https://support.safe.com/hc/en-us/articles/25407494166029-Connecting-to-Salesforce-in-FME but am getting this error “Request to update access token in connection storage failed. (HTTP Error 'HTTP/1.1 400 Bad Request': '{"error":"invalid_grant","error_description":"invalid code verifier"}')” when I test the connection

      1 reply

      desiree_at_safe
      Safer
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      Hi ​@londonwalker! That invalid code verifier error sounds like PKCE is in the mix, and that there’s a mismatch between what FME is sending and what Salesforce is expecting.

       

      To help us get to the bottom of this, I'd recommend opening a Support Case 🙂 along with:

      • Screenshots of your current web service definition in FME (FME Options>Web Connections > Manage Web Services > your Salesforce service)
      • The Salesforce documentation or steps used to set up your Connected App (or External Client App if you're on a Spring '26 org)

       

      Those details should really help!

      Happy FME-ing!

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