Traceback (most recent call last):
  File "/var/daca@home/donate-cpu-server.py", line 1207, in run
    text = diffMessageIdTodayReport(self.resultPath, messageId)
  File "/var/daca@home/donate-cpu-server.py", line 533, in diffMessageIdTodayReport
    diff_stats = json.loads(f.read())
  File "/usr/lib/python3.9/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.9/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.9/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)