error on this: fs . writeFile ( fileName , pdfBytes , err => { if ( err ) { console . log ( err . message ) reject ( err . message ) } else resolve ( fileName ) }) #1 It looks like when deployed into Cloud Run it also requires the extra permission "Service Account Token Creator" to run getSignedUrl . Locally for some reason this role is not required. #2 Only the directory /tmp is writable in Cloud Run. So, change the default write location to write into this directory. However, you have to be aware of 2 things: Cloud Run is stateless, that means when a new instance is created, the container start from scratch, with an empty /tmp directory /tmp directory is an in-memory file system. The maximum allowed memory on Cloud Run is 2Gb, your app memory footprint included. In addition of your file and Airflow, not sure that you will have a lot of space. A final remark. Cloud Run is active only when it...