Trying this against a CSV exported from https://www.regulations.gov/bulkdownload I got an exception visiting /-/edit-schema/data/tablename - error was:

OperationalError: near "Address": syntax error

One of the columns in the table was called Representative's Address and I think the ' broke it.

The traceback highlighted examples_for_columns:

https://datasette-cloud.sentry.io/issues/4380834663/?project=2050376&query=is%3Aunresolved&referrer=issue-stream&stream_index=0