Backend error on custom endpoind

File “C:\Users\coding\Documents\RadSystems\PHPRad Projects\revised\python-flask-api\venv\Lib\site-packages\flask_cors\extension.py”, line 161, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File “C:\Users\coding\Documents\RadSystems\PHPRad Projects\revised\python-flask-api\venv\Lib\site-packages\flask\app.py”, line 1523, in full_dispatch_request
rv = self.dispatch_request()
File “C:\Users\coding\Documents\RadSystems\PHPRad Projects\revised\python-flask-api\venv\Lib\site-packages\flask\app.py”, line 1509, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
TypeError: wrapper() missing 1 required positional argument: ‘fn’