why api '/app/api/wheel/{wheel_id}/participant' returns 400 and says 'Authorization header is invalid -- one and only one ' ' (space) required'

after I config everything else, opened page And login, created a new wheel. It appears thee 400 ERROR. I didn't change anything from github about *.py and *.jsx
PLEASE HELP
THX AAAAAAA LOT

Start by locating the handler for /app/api/wheel/{wheel_id}/participant and reviewing the authentication configuration used after login. Reproduce the request with a newly created wheel and inspect the Authorization header; done means the endpoint accepts the logged-in request instead of returning this 400 error.

Written by the indexing model from the issue text.