Oracle Wallet

We recently upgraded from Oracle 11g to 19c in Windows environment. We were successfully able to use UTL_HTTP but now we get the error

ORA-29273: HTTP request failed

ORA-06512: at "SYS.UTL_HTTP", line 1530

ORA-29024: Certificate validation failure

ORA-06512: at "SYS.UTL_HTTP", line 651

ORA-06512: at "SYS.UTL_HTTP", line 1472

ORA-06512: at line 1

29273. 00000 - "HTTP request failed"

*Cause:  The UTL_HTTP package failed to execute the HTTP request.

*Action:  Use get_detailed_sqlerrm to check the detailed error message.

      Fix the error and retry the HTTP request.

when using the below query using sysdba.

SELECT utl_http.request('