[Demo Web, Authflow] Open Settings Button not working

## Background
- Environment: Staging
- Demo web app: token-app1
- Authgear staging app: qa-authflow ; Token based app

## Description
Open Settings Button not working for Token Demo Web App

## Steps to reproduce
1. Go to token-app1
2. Sign up or sign in with any account
3. After successful auth, click Open Settings
9. See button not working

## Expected result
Show settings page

## Screenshot

https://github.com/authgear/authgear-server/assets/4337525/c6164bd9-4b69-48f8-8c7e-c1f5d2621947

Start by reproducing the issue in the token-app1 demo web app on staging: authenticate, then click Open Settings. Trace the Open Settings entry point and verify that the flow reaches and displays the settings page.

Written by the indexing model from the issue text.