Check in order
- Look behind the app and on other desktops for the dialog.
- Quit and reopen FlowWrite.
- Try opening a file in another app, such as TextEdit.
- Restart your Mac if several apps have the same issue.
If you use iCloud Drive
Check sync progress in Finder and retry once it finishes. Before changing iCloud settings, back up important files and retain local copies that have not uploaded.
See Apple’s iCloud Drive help.
Contact support
If the issue continues, include your FlowWrite and macOS versions and the affected action, such as importing, exporting, or changing a cover.