[Risolto] Translation Management gone

Background of the issue:
I am trying to access the 'Translation Management' option in the WPML menu, but it has disappeared. The WPML button leads to a 404 error. I have tried turning the plugin off and on, but the issue persists. Here is the link to the page where the issue can be seen: link nascosto

Symptoms:
The 'Translation Management' option is missing from the WPML menu, and the WPML button results in a 404 error.

Questions:
Why has the 'Translation Management' option disappeared from the WPML menu?
How can I resolve the 404 error when clicking the WPML button?