The joblib files for some metrics not written

[ssorou1]

When running fs_proc_algo.py, the joblib files for some of the metrics (KGE and RMSE) are not generated. I am working under my fork (ssorou1/formulation-selector), branch ss_test_branch.
If I change the n_estimators in 'xssa_algo_config.yaml' from list to a single value (n_estimators: [50,100,200,300,400]), more joblib files are updated, but still 'algo_mlp_KGE__juliemai-xSSA.joblib' and 'algo_mlp_RMSE__juliemai-xSSA.joblib' files are not updated.

Screenshots

[glitt13]

This should be fixed based on glitt13@7a819cf
Will close once this becomes a PR, reviewed, and integrated into the main branch.