16.3.1 cannot create datasource

Installed 16.3.1 core server and all of the supporting frameworks, redist, clients, etc., etc.

16.3.1 gives an error when trying to create a new datasource:

'The type initializer for 'Oracle.DataAccess.Client.OracleConnectionStringBuilder' threw an exception.'

Any ideas?  The db target is the same as another server that works, so, this is related to this specific server.

Does 16.3.1 not support Oracle 11 any longer?