This is an update to an earlier blog post: Failing successfully: A SheepShaver random startup error.
Some good news, the latest version of SheepShaver for Windows has fixed (or at least massively reduced) the 'Cannot map SheepShaver Data area: No error' error.
The current version (at time of writing) is SheepShaver-Windows-25-02-2024, which implements this fix. You can find a link to this version on the Emaculation SheepShaver forum, SheepShaver for Windows post.
Farewell weird SheepShaver error!