No matching authentication protocol - connect ADW to private endpoint Oracle DB - oracle

I created db-link on ADW based on OCI to private endpoint (without wallet) to Oracle DB 11.0.2 and I get error like: ORA-28040: No matching authentication protocol
I tested the same solution on Oracle Database 19c based on OCI, create db-link to Oracle DB 11.0.2 and I get NO ERROR and db-link is working ok.
ADW and Oracle Database 19c have the same DB Version.
Why ADW has error while Oracle DB 19c get no erro?
What can I do on ADW to connect with Oracle DB 11.0.2?
Edit1:
'11.0.2' -- There is 11.2.0.1.
Oracle 19c on tradition install on Linux instance on OCI - and it's working. ADW on OCI - has error.

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