Label_values doesn't show prometheus data in template variable

Grafana
1

Prometheus metrics are:
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“ViewWriteLatency”,scope=“ViewWrite”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write-TWO”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write-THREE”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write-SERIAL”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write-QUORUM”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write-ONE”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write-LOCAL_SERIAL”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write-LOCAL_QUORUM”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write-LOCAL_ONE”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write-EACH_QUORUM”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write-ANY”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write-ALL”}
org_apache_cassandra_metrics_clientrequest_oneminuterate{instance=“10.10.179.100:7070”,job=“cassandra-job”,name=“Unavailables”,scope=“Write”}

And I’m trying to create a variable in template with: label_values(org_apache_cassandra_metrics_clientrequest_oneminuterate, environment)

It doesn’t pull any data. Neither does label_names.