ORA-29024: Certificate validation failure after upgrade to 19c

Hi,

Upgraded from 11.2.0.4 to 19.3 without any issues. But the this fails

SET SERVEROUTPUT ON

EXEC UTL_HTTP.set_wallet('file:/u01/wallet/sitoo', 'ggyytte11');

> EXEC show_html_from_url('https://api-test.com');

ERROR at line 1:

ORA-29273: HTTP request failed

ORA-06512: at "KALLE.SHOW_HTML_FROM_URL", line 23

ORA-29024: Certificate validation failure

ORA-06512: at "SYS.UTL_HTTP", line 380

ORA-06512: at "SYS.UTL_HTTP", line 1148

ORA-06512: at "KALLE.SHOW_HTML_FROM_URL", line 7

ORA-06512: at line 1

How to fix this?

Regards

TheLonelyDBA