@markjones333 and @minhsang.vo please don’t provide additional information as answers as that will remove the question from the unanswered queue which reduces its visibility. In this case I got notified because of my previous comment, but in other situations the question may move completely out of radar.
In relation to the issue itself, I’ll need to try to replicate the situation. I confess that the times I configure Wordpress with Auth0 I do it by creating the client application in the Dashboard itself and then just setting the necessary configuration for login.