1) Go to the folder defined in TNS_ADMIN environment variable (folder where you extracted the wallet).
2) Make a copy of sqlnet.ora in the same folder
3) Rename the copy of sqlnet.ora to sqlnet.ora_bak to keep the original config backup.
4) In the sqlnet.ora file replace the following string:
with TNS_ADMIN path. e.g.
Where "C:\instantclient_19_3\wallet" is TNS_ADMIN path
5) Start the app and try to connect to the Oracle Cloud Database.