WPML license is unregistered

Overview of the issue

After installing WPML, you need to register your license. Depending on your server setup and how it communicates with our update server, you may see that on your site, WPML gets unregistered and you need to create a new key without any reason.

Workaround

You can try to set

define( 'OTGS_INSTALLER_SITE_KEY_WPML', 'your-site-key' );

in your wp-config.php file, where the value your-site-key is the one that you get from https://wpml.org/account/sites/ when you register your site.