Hello @tanjil 

Thank you for contacting databricks community support. Could you check what version of protobuf you have?

If you are using 10.4 ML cluster, the MLflow 1.x is not compatible with protobuf 4.x. The default version of protobuf in MLR 10.4 is 3.17.2. We recommend that you can either downgrade protobuf to 3.17.2 or upgrade MLflow to 2.x. Thanks