My Mac app is approved for sale in the store. It is free to download with several in-app purchases.
When I use the Mac App Store (10.14 or 10.13) and 'Get' the app I see it appear briefly in the Applications directory with the name:
XYZ.appdownload. (this has the correct icon)
AND then it just disappears!! The Store shows no error and I can apparantly repeat this over and over...
What is going on? What should I do?Please advise!