有人可以帮我吗，我尝试运行此git，但出现了这些错误

Question

我已经运行了这个git：https://github.com/fernandolobato/decentralized-blockchain-voting.git

但是当我尝试编译它们时，出现了这些错误。

Traceback (most recent call last):
  File "./compile.py", line 78, in <module>
    main()
  File "./compile.py", line 73, in main
    contract = format_contract(contract_json_string, contract_file_name)
  File "./compile.py", line 16, in format_contract
    contract = json.loads(contract)
  File "/usr/lib/python2.7/json/__init__.py", line 339, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python2.7/json/decoder.py", line 364, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode
    raise ValueError("No JSON object could be decoded")
  ValueError: No JSON object could be decoded