TimedText-InvalidFormat (Invalid Format)
File (1147684_GONCHI_25P_SUBS_ja.stl) is not a valid lambdaCap format
The Timed Text source file is not a valid format for the language used. Usually occurs when you have attempted to upload a LambdaCap (.cap) file that includes a language other than Japanese or you have attempted to upload a Japanese language asset in any format other than LambdaCap.
Ensure you are using the correct file format for the language.
Languages that have format restrictions against them are:
Japanese: LambdaCap only
Korean: TTML only
Chinese: TTML only