I know what’s the problem now, the encoding issue when downloading certain files.
I have mentioned a possible workaround for this here: Read text in .txt file stored in google drive - #4 by samliew
You can use a “Convert encoding” module using the same input and output encoding, then you can use the output of this module in your Parse CSV module.
Alternatively, you can simply try {{toString(6.data)}} in your JSON string field.