It seems like your Komento installer not injected the API key so hitting this warning message when you access Komento language page.
Can you try download latest launcher or full installer from
https://stackideas.com/dashboard then upload through your Joomla backend installer page and proceed the installation, it should fix this issue.
After you can access language page from backend, you have to select Italian language and click install.
If the issue still persists, can you provide us with your Joomla backend and FTP access at
http://stackideas.com/dashboard/site so we can better have a check?