Facebook Marketplace Listing Error (Query Error - Error performing query )

Hello everyone.
Some of my clients reported an issue, While they're listing in the marketplace they get this error (Facebook Marketplace Listing Error (Query Error - Error performing query )

Do you guys think its Proxy problems or Cookies or what else? Any Tips will be appreciated

Thank you

Have you tried posting without proxy? If there's still error, it's not proxy.

Most probably browser + cookies error, try to delete cookies, update browser and it should work

Have you tried changing your proxy?