Crystal Report 2016, Windows 10 - The database connector 'crdb_oracle.dll' coulf not be loaded

I have the following software installed:

Windows 10 Enterprise

Oracle Client 12g x64

SAP Crystal Reports 2016 SP6

In Windows system variables, I have a TNS_ADMIN entry and Toad for Oracle is picking this up correctly.

Any ideas please? I see lots of similar questions for earlier versions of CR, but not for 2016.

Thanks