Data 360: Error 'error=redirect_uri_mismatch&error_description=redirect_uri%20must%20match%20configuration' in Query Workspace Setup

This error indicates an issue with a URL entered during setup is incorrect. Confirm that the URL field when creating the named credential is in the following format, with your org's domain entered in place of [your domain]:

https://[your domain].my.salesforce.com/

If your named credential has the correct URL format, then review the connected app you created when following Create a Connected App for Query Workspaces and doublecheck that the Callback URL also has the same domain format. It should look as follows:

https://[your domain].my.salesforce.com/services/authcallback/QueryWorkspaces

If you copied and pasted your org's domain from the browser address bar, then you may have entered the domain as [your name].lightning.force.com, which can lead to the error during named credential creation. If you need to modify the Callback URL of your connected app, allow 5-10 minutes after saving your changes before re-attempting to create the named credential.