[Closed] Advanced translation editor not opening, even when it's the default

Background of the issue:
I am trying to translate events using the advanced translation editor, but the classic WordPress editor opens instead. The issue can be seen at this link: hidden link.

Symptoms:
The advanced translation editor is not opening as expected, and the default WordPress editor appears instead.

Questions:
Why is the advanced translation editor not opening when it's set as the default?
How can I ensure the advanced translation editor opens instead of the classic WordPress editor?