Migrating from folders to folderish pages using /@@migrate_to_volto does not work reliably for me.
When I visit a migrated folder (now a folderish page), I get the following output
We apologize for the inconvenience, but the page you were trying to access is not
at this address. You can use the links below to help you find what you are looking for.
I'm also having issues with events, when I visit an event that was migrated (even as an admin) I get:
# Unauthorized
### You are not authorized to access this resource.
You are trying to access a protected resource, please [log in](http://localhost:3000/events/advanced-business-law/login) first.
Can you access the FolderishPage in the backend?
I once had the issue that during the migration to Volto (from Plone 4) I had to restart the instance and rebuild the catalog before migrating to Volto.