I had a problem trying to use joint training:
File "/data/disk1/sxtang/anaconda3/envs/pytorch1.13.0/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)