Erro retorno endpoint /api/documentos/<modelo>

erro.py

ERROR:waitress:Exception while serving /api/documentos/modeloantonio
Traceback (most recent call last):
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/waitress/channel.py", line 428, in service
    task.service()
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/waitress/task.py", line 168, in service
    self.execute()
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/waitress/task.py", line 434, in execute
    app_iter = self.channel.server.application(environ, start_response)
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/waitress/proxy_headers.py", line 64, in translate_proxy_headers
    return app(environ, start_response)
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask/app.py", line 2548, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask/app.py", line 2528, in wsgi_app
    response = self.handle_exception(e)
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask_cors/extension.py", line 165, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask/app.py", line 2525, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask/app.py", line 1823, in full_dispatch_request
    return self.finalize_request(rv)
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask/app.py", line 1844, in finalize_request
    response = self.process_response(response)
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask/app.py", line 2337, in process_response
    response = self.ensure_sync(func)(response)
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask_cors/extension.py", line 185, in cors_after_request
    set_cors_headers(resp, res_options)
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask_cors/core.py", line 245, in set_cors_headers
    headers_to_set = get_cors_headers(options, request.headers, request.method)
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask_cors/core.py", line 177, in get_cors_headers
    origins_to_set = get_cors_origins(options, request_headers.get('Origin'))
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask_cors/core.py", line 153, in get_cors_origins
    return sorted([o for o in origins if not probably_regex(o)])
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask_cors/core.py", line 153, in <listcomp>
    return sorted([o for o in origins if not probably_regex(o)])
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask_cors/core.py", line 261, in probably_regex
    return any((c in maybe_regex for c in common_regex_chars))
  File "/home/antonio/miniconda3/envs/cnj-sas-webapi/lib/python3.9/site-packages/flask_cors/core.py", line 261, in <genexpr>
    return any((c in maybe_regex for c in common_regex_chars))
TypeError: argument of type 'NoneType' is not iterable