Full error name: “Facebook page unavailable“
May 4, 2023
The error message “this content isn’t available right now” is returned when clicking on the “eye icon” to see the preview in Nembol.
The preview may not be available for permission reasons. Indeed, Facebook may prevent third-party apps from accessing content published on Facebook Page.
Check directly on your Facebook business page to see the listings.
Bottomline: the posts will be available even if the preview wasn’t available in Nembol.