[Resolvido] For some reason our homepage is not translatable

Background of the issue:
I am trying to translate the pages with the advanced translation editor.

Symptoms:
For some reason, our homepage is not translatable. I expected to see the advanced translation editor open, but instead, I got a new page with the Gutenberg editor and a notice to use the advanced editor. However, that button doesn't work.

Questions:
Why is the homepage not translatable?
Why does the advanced translation editor button not work?