Background of the issue:
I'm trying to save a translation using the ATE, but it's buggy. The "Save" button doesn't seem to work.
Here is the video that explains clearly the issue: hidden link
Thank you for contacting WPML support. While you wait for one of my colleagues to take this ticket and work on it, let me provide you with the first debugging steps or see if I can help with the issue quickly.
While translating that page with the Advanced Translation Editor, click the gear icon in the top right corner. Then, switch to the previous versions of the Advanced Translation Editor. Please see the attached screenshot. Then, you should be able to complete the translation of this page.