edit page visual not working

Dear,
When I try to edit a page the "visual" is not working.
Before I was used to copy&paste text with images as well but now as the "visual" is not working I can paste only text and also then the visual is not working.
I am not sure since when this is happening maybe since the new wp version I assume.
Please see the screenshot.
You can see that after entering some text then going to visual is showing nothing.
Is there a way to make the visual working again?
Thanks,
Paddy