Failed to run browser test (in the builder) with an online demo

I implemented an experiment in psychopy, which runs locally but doesn’t work in the browser testing mode. So I decided to run a browser test with an online demo (choicertt). I downloaded the code from Gitlab and confirmed that I could run the experiment locally in the builder, but when I ran it in browser mode, I saw a blank screen. Does it mean there are some system-level issues (e.g. related my OS/psychopy version)? Thanks ahead!

URL of the experiment: demos / Choice Reaction Time Task · GitLab
OS (e.g. Win10): macOS 14.4.1
PsychoPy version (e.g. 1.84.x): 2024.2.1
Standard Standalone? (y/n) If not then what?: y
What are you trying to achieve?: get the builder browser test to work on any experiment

What specifically went wrong when you tried that?:
The browser window is completely blank, and when I check the developer tool, the error message is:
GET http://localhost:12002/lib/psychojs-2023.1.3.js net::ERR_ABORTED 404 (File not found)