no "Done" button to exit mask mode in Lightroom web

There´s no "Done" button to exit mask mode in Lightroom web. I have paid version, but now I¨m not at home, so I had to use Lightroom web. Chatgpt gave me many resources to resolve the problem, but none functioned. I can't exit mask mode. I'm afraid I will loose all the work I´ve done. How can I continue working globally? My suggestion is to put a simple and clear way to exit mask mode in Lighroom web. Thank you.