Create a tiny sample with the real column names and two or three invented rows. Preserve the troublesome pattern—such as quoted commas, blank values, or a date format—without exposing real people or accounts.
Check the delimiter and character encoding, then test the sample in CSV to JSON if conversion is the issue. Describe what you expected and what happened. Do not upload the full dataset merely because a few rows would suffice.
Which column or row demonstrates the problem?