Serviceaccount does not have bigquery.jobs.create permission

After creating new service account with same permission as per previous account, its working. I don't know whats wrong with previous account. May be some issue from service account.

You need to specify the credentials of the service account as a parameter of the BigQueryClient constructor.

You can do it with the keyFilePath parameter:

$bigQuery = new BigQueryClient([
            'projectId' => 'project-xxx',
            'keyFilePath' => '/path/to/file.json'   
        ]);

Also, check with this command that you granted the permissions to the service account:

gcloud projects get-iam-policy yourProjectID

EDIT:

Let's take a different approach creating a service account and granting permissions to it from scratch.

1. Create new service account:

   gcloud iam service-accounts create [NAME]

2. Grant the permissions:

gcloud projects add-iam-policy-binding [PROJECT_ID] --member "serviceAccount:[NAME]@[PROJECT_ID].iam.gserviceaccount.com" --role "roles/bigquery.admin"

3. Create credentials file:

gcloud iam service-accounts keys create [FILE_NAME].json --iam-account [NAME]@[PROJECT_ID].iam.gserviceaccount.com

4. Add the path of this file to the BigQueryClient contructor and run your code.