Resolution:

Edit the “/opt/jfrog/artifactory/var/etc/artifactory/artifactory.cluster.license” file inside an Artifactory node pod and add all license keys (separated by an empty new line) to the file. Apply the same steps in other Artifactory nodes.

Another way to load the license keys is to create a secret and add it to the Operator yaml. For example,

...
      preStartCommand: >- 
      uid: '1000721030'
    license:
      secret: artifactory-license
      dataKey: artifactory.cluster.license
    database:
      driver: com.mysql.cj.jdbc.Driver
...