It appears that your site is using an older HubSpot CRM integration. HubSpot recently announced that they have switched from API Key authentication to Private Apps. Any existing integration must be switched before November 30, 2022. This change will break existing integrations and requires an update to Freeform to fix the connection. Please update Freeform to 4.0.1 or greater and follow the special instructions here: https://docs.solspace.com/freeform/hubspot-update