I set up two Elasticsearch clusters (cluster_a, cluster_b) and I was able to set cluster_a as a remote cluster on cluster_b and vice versa.
Using the dev CLI feature, I am also able to query indexes of cluster_a from cluster_b and vice versa.
However, when I try to add cluster_a's indexes to cluster_b, I get the error "Failed to Load Indexes". This happens in the other direction as well.
Does anyone know what could be causing this error and some methods to resolve it? I know for sure that they are connected since I am able to query the indexes from the dev CLI and I see the green check mark on the Remote Index UI. I checked in the network tab on the browser and no errors appeared as well.
Any ideas are appreciated.