You ONLY run import-hive.sh for table/objects created before enabling the Ranger-hive plugin, after enabling the plugin the hook should automate that process.
Could you validate by testing now with the plugin enabled and update and close the thread too.And if you feel my answer helped "Accept"
Ranger plugins for Atlas and hive are enabled. Automatic sync will happen only if Advanced hive-atlas-application.properties is true in Ambari atlas.hook.hive.synchronous - boolean, true to run the hook synchronously. default false. Recommended to be set to false to avoid delays in hive query completion.