raise JSONDecodeError("Expecting value", s, err.value) from None json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[rambhaskark]

Getting the below error while trying to run the tool.

(.venv) [cfn-template]$ cat aws-waf-security-automations.yml | cfviz | dot -Tsvg -oexample.svg -bash: dot: command not found Traceback (most recent call last): File "/home/rambhaskar/cloud-formation-viz/.venv/bin/cfviz", line 33, in sys.exit(load_entry_point('cloud-formation-viz==0.0.1', 'console_scripts', 'cfviz')()) File "/home/rambhaskar/cloud-formation-viz/.venv/lib/python3.10/site-packages/cloud_formation_viz-0.0.1-py3.10.egg/cloud_formation_viz/main.py", line 22, in main template = open_cfn(sys.argv) File "/home/rambhaskar/cloud-formation-viz/.venv/lib/python3.10/site-packages/cloud_formation_viz-0.0.1-py3.10.egg/cloud_formation_viz/main.py", line 47, in open_cfn template = json.load(sys.stdin) File "/usr/local/lib/python3.10/json/init.py", line 293, in load return loads(fp.read(), File "/usr/local/lib/python3.10/json/init.py", line 346, in loads return _default_decoder.decode(s) File "/usr/local/lib/python3.10/json/decoder.py", line 337, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "/usr/local/lib/python3.10/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)