Uncaught SyntaxError: Identifier 'core' has already been declared

Online experiments
1

URL of experiment: jtc [PsychoPy]

Description of the problem:

Hello, everyone I create a Jump to Conclusion task using Python, however, it seems to be get stuck at initialising. I have tried all the fixes I can find but cannot seem to get it to work. Could someone help me out with this error?

2

Have you got custom Before Experiment code?

// Start code blocks for 'Before Experiment'
// Run 'Before Experiment' code from jtc80_code
import { core, event, visual } from 'psychopy';
import { Math } from 'psychopy/lib/util-2020.1.js';
3

I do not have any code in the Before Experiment section. This is a JTC task that I want to be presented after the participants have completed my survey in Pavlovia.
I have gone through some of the other threads and created the experiment again, however, now it gives me a 403 Error. I am new to PsychoPy and JS so I am not sure if I am doing this right. Any help would be appreciated.
New Experiment link: https://run.pavlovia.org/Ntjh37/jtc_task/?__pilotToken=9bf31c7ff062936a96d3c8bd1f8f2ff3&__oauthToken=84e52cdb5cc044e6f5bd4ced4340b82a3f7d88cef021754e7c7f382c90e95fc3