Text Block in Avia Layout builder and "visual" in default editor not working

Hello,

The description of the problem is easy : it suddenly became impossible to edit text. Text block in Avia layout builder is just white, I can’t do anything as there is not even a text cursor. The problem is the same for the normal WordPress editor (Visual). However it works when I pass from “Visual” to “Text”, but then I just get the html possibilities of course.

I deactivated all plugins and it didn’t help. When I switch to default theme Twenty thirteen, the problem is fixed, it’s working normally.

The problem hapenned to other people on the forum but I couldn’t find a clear answer. It happened to me before and got solved by itself. The problem disappeared as suddenly as it came up.

That’s quite a handicap and I would like to know what can be done to have the text editor working properly ?

Thank you very much,
Emmanuel