how to hide this in public?

[Shahzadqayyum]

Connected to database blogscha_short on localhost
SQL perform: SELECT option_name, option_value FROM url_options WHERE 1=1 (0.00030 s)
cURL error 60: SSL certificate problem: certificate has expired (POST on https://api.yourls.org/core/version/1.0/)
SQL perform: UPDATE url_options SET option_value = 'O:8:"stdClass":4:{s:15:"failed_attempts";i:24;s:12:"last_attempt";i:1647189852;s:11:"last_result";s:0:"";s:15:"version_checked";s:5:"1.8.2";}' WHERE option_name = 'core_version_checks' (0.00026 s)
Check for new version: no

its showing both private and public after footer.

[ozh]

This appeared after you added define ('YOURLS_DEBUG', true); to your config.php