Access Denied: Project User does not have bigquery.jobs.create permission in project If you didn’t select a project or selected the public project

This error message appears when you try to query or create new datasets when no project has been selected. You must query and select data within a project.

A similar error message.

Access Denied: Project bigquery-public-data: User does not have bigquery.datasets.create permission in project bigquery-public-data.

if you accidentally try to query while browsing BigQuery public data.

 If you try to create a database in google bigquery public data you may also run into this issue.