Unable to load or query Apache-druid Lookups

We have a lookup map that we are trying to use to do an inner join with a druid table. I am able to get the lookup created from API as well as from UI. It also shows up in UI and looks as expected.

However, the status of that is always, unloaded. And I cannot use query to do the lookup because they are never loaded.

Is there anything specific that needs to be done to load/activate the lookups once they are created ?

All of them are in default_tier right now. The druid version is 0.16.1-incubating.