Training Custom Speech model

I have faced below error When Training Custom Speech model .
Data uploading and testing was succeeded.

Are there any way to check what happen on this Custom Speech

Error message: Internal server error. Please recreate the task in a while. If the failure still happens, please create an Azure support request.

romungi-MSFT 43,656 Reputation points Microsoft Employee

2021-01-07T07:21:02.327+00:00

@Saitou, Hiroshi/斉藤裕司 This error seems like a intermittent error. Normally retrying the training should resolve this if your data has been successfully uploaded and validated. Could you please try to train again and report if there is still an error.
romungi-MSFT 43,656 Reputation points Microsoft Employee

2021-01-15T13:25:13.713+00:00

@SatiouHiroshi-2462 Did you get a chance to retest your scenario with the speech portal?
Saitou, Hiroshi/斉藤裕司 6 Reputation points

2021-01-16T09:52:44.16+00:00

I found that if I set the language to Japanese and upload a file containing katakana characters, an error occurs.