After we succeed to sync Sharepoint with Elastic workspace I'm trying to connect Salesforce with no success. We getting "Unable to load page"
and the URL - https://elastic.xxxxx.com:xxxx/app/enterprise_search/workplace_search/sources/added?error=invalid_request&error_description=missing+required+code+challenge
We could not find any successful or failed login attempts via the elastic app in SF logs.
The difference is that the guide that you've linked is for a different tool of ingestion - Connectors. They will also bring data from Salesforce to your deployment and is a recommended way to do so as Workplace Search is not being actively developed.
Maybe you can switch to using connectors and see if it works for you?
Returning back to your original problem, I see that the error that you get is missing+required+code+challenge. I see in your setup that you have "PKCE" enabled, you might need to turn it off to make the Workplace Search connector work. Alternatively, as mentioned above, you can try the Salesforce Connector hosted on your infrastructure outside of Enterprise Search deployment.
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