Hi there @phuong.le ,
I found your tenant name internally to look more into your configurations. I can see that the reset password flow runs against your external database connection because the import mode (to migrate the user to the Auth0 store) is turned off.
Because of that, I would double-check the corresponding to your custom database “Change Password” script.
For debugging, you can install and use our extension “Real-time Webtask Logs” tool
To see what’s happening in your “Change Password” script while it is being run, you can add consol.log() on each step to print the responses and inspect them via the Real-time Webtask Logs.