Just a quick note, and in case this happens to someone else out there:
I have recently upgraded to iOS 14, and with it I saw there was a new version of Storyist for iPad. After downloading it, it appeared that the new version didn’t want to display any of my old documents anymore. They opened just fine, but no text was displayed. Strangely, even creating brand new documents with that version behaved the same way. I couldn’t type nor read anything, even though the word counter was counting.
The only thing I knew to do was to remove the app and install a fresh version. That works fine, and all my (old and new) documents can be read without trouble. So just in case somebody has a similar experience: hold down the white Storyist icon on the dashboard until it wiggles, then choose to Delete The App. Then head over to the App Store, go into Purchases, find Storyist and install it again. Provided you’ve saved files in iCloud, your work should be save.
Failing that, get yourself the legacy version of Storyist 3 (black icon). It too will open documents and allow you to export them should the need arise. Always good to have a backup 🙂