Text invisibile in edit mode

I went into edit one of the pages of my site today and it’s totally white inside the edit section. The text has become invisible. It won’t let me switch from visual or html, in fact I can’t tell which mode it’s in, even though both tabs are showing. The toolbar is not showing at all. If I hold and drag my mouse in that section it lights up words that are in the box but I have to keep them highlighted if I want to edit them.

The page is here https://vadirectory.net/vadirectory/victoria-2/. It views ok as published but to edit it, I can’t see a thing.