INTL has no series anymore
As reported by a user by email, INTL has no data.
EIA distributes a https://www.eia.gov/opendata/bulk/INTL.zip without any series (only JSON lines about categories).
I wrote to EIA about that and I'm waiting for an answer.
In the meanwhile I reverted the INTL dataset to the latest non-empty revision, but the converter needs to be adapter to avoid producing an empty dataset.