[Closed] Set price in other currencies manually - not working

I believe there is an error behind this. Can you enable enable debug log and check what is inside the moment you save the changes?

You can do this by adding a few lines to the site’s wp-config.php file. With error log enabled, you will see what the actual problem is.

To enable it, open your wp-config.php file and look for define(‘WP_DEBUG’, false);. Change it to:

define('WP_DEBUG', true);

In order to enable the error logging to a file on the server you need to add yet one more similar line:

define( 'WP_DEBUG_LOG', true );

In this case, the errors will be saved to a debug.log log file inside the /wp-content/directory.

https://wpml.org/documentation/support/debugging-wpml/

Let me know what you see after the debug mode has been enabled.