ORA-28759: failure to open file

I have implemented oracle wallet using orapki utility following this guide : https://stackoverflow.com/questions/63834638/how-to-change-protocol-for-oracle-database-connection-in-asp-net-core However, when I try to connect from the App Server to the database using the TCPS Protocol on non-default port 1531, I am getting the following error :

SQL*Plus: Release 12.1.0.2.0 Production on Fri Dec 23 10:30:23 2022
Copyright (c) 1982, 2014, Oracle.  All rights reserved.
Enter password:
ERROR:
ORA-28759: failure to open file
Enter user-name:

Is it the database user that I am trying to connect as need the permission on the db server wallet files? Does it need permission on the entire wallet folder or something else? I found nothing in the trace folder currently oracle user own the wallet folder: /oracle/apps/product/19.3.0.0/db/owm/wallets/oracle

Database :
Oracle 19c on Linux 7

App Server :
Windows Server 2016 with Oracle Client 12.1