No clusters found with sufficient samples of class (class_sample). Try lowering the cluster_balance_threshold or increasing the number of clusters.

Raise code

valid_clusters.append(cluster_mask)
                cluster_sparsities.append(self._find_cluster_sparsity(X_cluster_class))

            cluster_sparsities = np.array(cluster_sparsities)
            cluster_weights = cluster_sparsities / cluster_sparsities.sum()

            if not valid_clusters:
                raise RuntimeError(
                    f"No clusters found with sufficient samples of "
                    f"class {class_sample}. Try lowering the "
                    f"cluster_balance_threshold or increasing the number of "
                    f"clusters."
                )

            for valid_cluster_idx, valid_cluster in enumerate(valid_clusters):