Tell us what you are trying to do?
This is a "product" custom post type in the main language working well. hidden link
I translate it to Spanish, I when I have the 100% complete translation done, when I try to visualize, the public url has a critical error. hidden link
Is there a similar example that we can see?
In the other custom post type "projectes" the translation is working well:
Main language catalan: hidden link
Translation ES: hidden link
To enable it, open your wp-config.php file and look for:
define('WP_DEBUG', false);
And change it to:
define('WP_DEBUG', true);
// Enable Debug logging to the /wp-content/debug.log file
define('WP_DEBUG_LOG', true);
// Disable display of errors and warnings which is recommended on a live site.
define('WP_DEBUG_DISPLAY', false);
@ini_set('display_errors',0);
Then try to reproduce the issue by visiting the translated product and check if any errors were saved to the debug.log log file inside the /wp-content/ directory
If you can paste your debug.log to https://pastebin.com/ and provide me that link, it would be great!