I have updated Drafts today on my Mac, but since the update it will no longer load on my Mac. I am running 10.13.6 on my Macbook Air. It seems like they have missed a file out which is stopping it working on 10.13 and 10.14.
They will be updating a fix shortly, support has said the latest patch is with Apple to push out to the app store, until then it will no longer work.
I am counting down until the update is out, this is such a key app for me.