Below are the reasons for Facebook Marketplace Not Working:-
1. New Account Restriction: Facebook aims to restrict access to Marketplace from recently created accounts to put a halt to scams.
2. Age Limit: Marketplace is off limits for those under 18 to avoid unauthorized purchases.
3. Location & Language Limits: Supported in over 70 countries; not available in unsupported regions.
4. Old App Version: An older version of the app may not support Marketplace.