json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[Drjacky]

GraphQLmap > dump_via_introspection
Traceback (most recent call last):
  File "/opt/homebrew/bin/graphqlmap", line 4, in <module>
    __import__('pkg_resources').run_script('graphqlmap==0.0.1', 'graphqlmap')
  File "/opt/homebrew/lib/python3.11/site-packages/pkg_resources/__init__.py", line 720, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/opt/homebrew/lib/python3.11/site-packages/pkg_resources/__init__.py", line 1570, in run_script
    exec(script_code, namespace, namespace)
  File "/opt/homebrew/lib/python3.11/site-packages/graphqlmap-0.0.1-py3.11.egg/EGG-INFO/scripts/graphqlmap", line 82, in <module>
  File "/opt/homebrew/lib/python3.11/site-packages/graphqlmap-0.0.1-py3.11.egg/EGG-INFO/scripts/graphqlmap", line 56, in __init__
  File "/opt/homebrew/lib/python3.11/site-packages/graphqlmap-0.0.1-py3.11.egg/graphqlmap/attacks.py", line 32, in dump_schema
  File "/opt/homebrew/lib/python3.11/site-packages/requests/models.py", line 900, in json
    self.content.decode(encoding), **kwargs
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/[email protected]/3.11.3/Frameworks/Python.framework/Versions/3.11/lib/python3.11/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/[email protected]/3.11.3/Frameworks/Python.framework/Versions/3.11/lib/python3.11/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/[email protected]/3.11.3/Frameworks/Python.framework/Versions/3.11/lib/python3.11/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)