According to the documentation, you cannot connect to SAP HANA instances configured to use SSL (see https://docs.microsoft.com/en-us/power-bi/desktop-directquery-sap-hana#limitations). Please enable SSL for SAP HANA Direct Query.
SSL is now mandatory for HANA Cloud, this problem becomes more urgent.
I am not convinced this is put as a limitation. All Enterprise organizations would enforce SSL for connectivity as their security policy, which is indeed a very basic feature which is expected.
As a MSBI platform specialist, i am unable to justify this limitation to our security team.