And When The wpml plugin deactivate then it again works fine and resolved the critical issue from customizer. please check and let me know the issue ASAP
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 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!