This thread is resolved. Here is a description of the problem and solution.
Problem:
You purchased the WPML but are unable to install it on your website because the WPML plugin cannot connect to wpml.org. This issue is likely due to network or security settings preventing outgoing communication to wpml.org.
Solution:
We recommend you try the following steps:
1. Log into your account on wpml.org and delete all old site keys.
2. In your WordPress dashboard, navigate to Plugins → Add New, and click on the Commercial tab. Then, click "Unregister WPML from this site."
3. Once the page reloads, click on "Register WPML." A prompt will appear asking you to enter the new site key. Click on "Get a key for this site."
4. In your WPML account, complete the site key wizard and ensure you select "Production site."
5. Finally, copy your new site key and paste it into the Commercial tab.
For more detailed instructions, please visit WPML documentation.
If this solution does not resolve your issue or seems irrelevant, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If you still need assistance, please open a new support ticket.
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