I copied my app to another one. After I opened the new copied app, the design on my index page had completely disappeared except for one element (my sidebar). I clicked on the preview and everything exists just as before, but it doesn’t show on my design window. I checked my old app and it’s the same case.
I can still find my elements in the “Pick an element” dropdown at the top, but I have to click everything one by one to bring it back, and if I refresh, everything is lost again.
What do I do? I don’t get what happened.