Hello,
please, can anybody describe how to properly import site's certificate into a wallet? The following query
select utl_http.request('https://community.oracle.com', null, 'file:/u01/app/oracle/product/12.2/db_1/owm/wallets/oracle', 'MyWalletPwd') from dual;
produces this output
SQL11.sql: Error (8,8): ORA-29024: Certificate validation failure
ORA-06512: at "SYS.UTL_HTTP", line 1501
ORA-06512: at "SYS.UTL_HTTP", line 380
ORA-06512: at "SYS.UTL_HTTP", line 1441
ORA-06512: at line 1
My wallet looks like this

DB version (prebuilt database development VM) is
Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
PL/SQL Release 12.2.0.1.0 - Production
CORE 12.2.0.1.0 Production
TNS for Linux: Version 12.2.0.1.0 - Production
NLSRTL Version 12.2.0.1.0 - Production
I've tried to export site's certificate to all possible formats (with or without chain) and still getting the same error.
Any help would be highly appreciated.
Regards,
Pavel