The Facebook page associated with this listing is not fully accessible to the the public due to geographic restrictions on it, this prevents users who aren't logged in from seeing your listings in addition to blocking those outside your geographic restriction.
Your Facebook Page is restricted by a geographic region.
Example: Page is only shown to people in United States
Remove the location targeting of your Facebook Page.
- Go to Page Settings
**replace YOURPAGENAME with your page username**
- Remove any country restrictions
- When complete the Country Restrictions should be set to "Page is visible to everyone." and the error will be removed.