Mooncraft world template stuck on update - cannot download or create

Downloaded and paid for world template Mooncraft. Clicked download button. Template appeared to download, but then a button saying “update” appeared. Clicking “update” does nothing. There is no “create this” button. 

I have uninstalled and reinstalled Minecraft, restored from backup, restarted iPad, reset iPad, tried with different internet connections, all have had no impact and I am still not able to create with this world template.