A StoryMap created in November 2020 in my University organisation account (Edible Campus), and successfully edited on 15th Dec 2020 (New Zealand Daylight Savings Time), can now (18 Jan 2021) be opened but not Edited (or Configured). When I try (as admin) it returns https://storymaps.arcgis.com/error?errType=story-load. This appears to coincide with an update to StoryMaps in December 2020 (What's new in ArcGIS StoryMaps (December 2020)!
I found a couple of auto-saved StoryMap drafts dated 16th Dec which I could open for editing but these had little or no content so I deleted them in the hope they might be the problem – no change. I then re-shared all the content (a StroyMap, and StroyMap Theme, and a Web Map) with Everyone (public) but the error remains, and switched my browser from Firefox to Chrome but the error remains.
Any ideas or help will be much appreciated.
Regards, John (AGOL Admin at University of Canterbury, New Zealand)