Getting "TlsException: Handshake failed" when I execute transaction method to get answer from a cloud DB

Hi, I'm trying to use third party cloud DB (Neo4j Aura), so I added .net version of the db access driver from the DB company(Neo4j) in my unity project and ran some queries. It worked fine in Unity Editor(2019.4.17f1) on my Mac, but if I build the project for Android and run it on a Android device, I'm getting the "TlsException: Handshake failed" error when DB transaction method is executed.

The exact error message is TlsException: Handshake failed - error code: UNITYTLS_INTERNAL_ERROR, verify result: UNITYTLS_X509VERIFY_FLAG_NOT_TRUSTED

I'm getting the error even in Unity editor if Unity version is 2020 or 2021.

Please let me know any ideas/suggestions that I can try to resolve the issue. Thank you.