升级到3.x后编辑时没有编辑器预览

[JammyDodger]

That’s fantastic

@peternlewis

Perhaps I should try removing and/or reinstalling that (if that’s a good idea, a pointer to how to do that would be helpful).

I missed this before, but just in case you need it, if you want to remove it completely you would edit your app.yml in pretty much the reverse of Install plugins on a self-hosted site