The spinning icons mean the files are updating from iCloud.Unfortunately, it is a known bug with iCloud that isn't only affecting GoodNotes but also other apps. In the meantime, please make sure to update GoodNotes to the latest version. We've implemented a workaround that should allow you to open documents even though they're still updating from iCloud and showing down arrows and spinning circles.
Usually, this issue can be fixed by either leaving GoodNotes open for a while or restarting the device. If restarting does not work already, here are three other suggestions:
1. Duplicate the files by tapping Edit>Duplicate and see if you can access the duplicates. If yes, you can delete the originals.
2. If you are using the Mac Version of GoodNotes as well: Open the documents, make a random edit and close them. They should be available on your iPad afterward.
3. Some users told us that they fixed it by using “Regenerate Missing Thumbnails” in Options>Settings>General under Troubleshooting. Others fixed it by editing the file name.
If the problem persists wait for one week. Sometimes it will fix itself.