We are aware of an issue that prevents users from being able to execute queries against bigquery-public-data.idc_current. Such queries will lead to the following error in the BigQuery console.
We are working closely with our partners at the Google Public Datasets Program to restore access, and will update the community as soon as the issue is resolved.
In the meantime, you should be able to execute queries against the latest release dataset instead of idc_current using bigquery-public-data.idc_v12.
We apologize for the disruption of access.