XGBOOST ERROR for AUTOML: Cannot build an XGBoost model - no backend found

Question

I am running h2o automl using anaconda env on a CentOS 7 Linux machine(CentOS Linux release 7.7.1908 (Core)). I get this error for XGBoost model.

Cannot build an XGBoost model - no backend found.

According to the docs, XGBoost option should work on a CentOS machine. I am using the latest h2o 3.28.0.3(pip installed in my anaconda env).

Any help is much appreciated.