• Java Runtime Environment (JRE) 8. The client has been tested with the OpenJDK 8 JRE. The client does not support Java 11.
• The minor version of your client Python installation must be the same as the minor Python version of your Databricks cluster.

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Databricks Runtime version >> Python version

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9.1 LTS ML, 9.1 LTS >> 3.8

7.3 LTS ML, 7.3 LTS >> 3.7

6.4 ML, 6.4 >> 3.7

5.5 LTS ML >> 3.6

5.5 LTS >> 3.5

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currently only above runtimes are supported

more here https://docs.databricks.com/dev-tools/databricks-connect.html