Error during baseUrl interpolation using the Salesforce integration
Looks like the ${auth.tokenResponse.body.instance_url} tag from the baseUrl property of the Salesforce integration is never available and generates an exception during the interpolation.
A quick analysis shows that the tokenResponse property doesn't exist, but the tokenResponseJSON is there:

@Frenchcooc is it something that could be solved just by updating the configuration or does it needs a fix?
@guillaumemeyer looks like a glitch indeed. I'd recommend that you first give a try by updating the integration's configuration file to tokenResponseJSON. Did you try that already?
I tried but the tokenResponseJSON is... wait for it... a stringified JSON, not an object :-( And through the interpolation, I can't use something like ${JSON.parse(auth.tokenResponseJSON).body.instance_url} as far as I can remember...
Looks like a cat biting his tail to me... Will give it a try asap.
Any news? Any way I can help?