"Got no data" after change "--online=false"

[00001101-xt]

I'm not using ivector for nnet3 model, referring to the help:

--online                    : You can set this to false to disable online iVector estimation and have all the data for each utterance used, even at utterance start.  This is useful where you just want the best results and don't care about online operation.  Setting this to false has the same effect as setting --use-most-recent-ivector=true and --greedy-ivector-extractor=true in the file given to --ivector-extraction-config, and --chunk-length=-1. (bool, default = true)

I changed --online option to false, but got the wrong return which is:

{"status":"error","data":[{"text":"Got no data"}]}

Any ideas on this?
Appreciate your help.