Error reported running Local debug mode of PsychoJS

If this template helps then use it. If not then just delete and start from scratch.

OS (e.g. Win10): Win10
PsychoPy version (e.g. 1.84.x): PayxhoPy 2021.1.2
Standard Standalone? (y/n) If not then what?: y
What are you trying to achieve?:
I have been having trouble getting my experiment to load and run in Pavlovia, so I tried to compile it locally in JS. It runs in Builder, but generated the following when I tried the local debug mode for PsychJS:

Traceback (most recent call last):
File “C:\Users\bwhitlow\AppData\Local\PsychoPy3\lib\site-packages\psychopy\app\runner\”, line 670, in runOnlineDebug
File “C:\Users\bwhitlow\AppData\Local\PsychoPy3\lib\site-packages\psychopy\app\runner\”, line 717, in getPsychoJS
req = requests.get(url)
File “C:\Users\bwhitlow\AppData\Local\PsychoPy3\lib\site-packages\requests\”, line 75, in get
return request(‘get’, url, params=params, **kwargs)
File “C:\Users\bwhitlow\AppData\Local\PsychoPy3\lib\site-packages\requests\”, line 60, in request
return session.request(method=method, url=url, **kwargs)
File “C:\Users\bwhitlow\AppData\Local\PsychoPy3\lib\site-packages\requests\”, line 533, in request
resp = self.send(prep, **send_kwargs)
File “C:\Users\bwhitlow\AppData\Local\PsychoPy3\lib\site-packages\requests\”, line 646, in send
r = adapter.send(request, **kwargs)
File “C:\Users\bwhitlow\AppData\Local\PsychoPy3\lib\site-packages\requests\”, line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host=‘’, port=443): Max retries exceeded with url: /core-2021.1.js (Caused by NewConnectionError(’<urllib3.connection.VerifiedHTTPSConnection object at 0x00000208CFAE46D8>: Failed to establish a new connection: [WinError 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond’,))

Suggestions on what might be wrong would be very helpful