@tinabee - I just had the same issue but when I spoke to support found out that you can still use the old editor but it's not obvious at first. When you go to add a section make sure you scroll all the way to the bottom till you see: The above sections use the new Fluid Engine editor. Looking for sections built with our Classic Editor?
Then click that link and now all the sections will build in the Classic Editor! I was panicking for a while but so grateful this is still an option 🙂
