Hi @mick1953, thanks for reaching out.
Messages like that could be linked to the background request being blocked by Wordfence.
Immediately after seeing the failure message, check your Live Traffic page. You should be able to see which firewall rule is causing the block by viewing the red text on an expanded entry. Sometimes you are presented with a “ADD PARAM TO FIREWALL ALLOWLIST” button here that could solve any problems going forward. This button automatically inserts the URL and its required params to the Allowlisted URLs section of the plugin.
Learning Mode while logged in as an admin may also help if you have no luck with the above. From the Wordfence Dashboard click on Manage WAF. Then you will see Basic Firewall Options > Web Application Firewall Status. Change the option to Learning Mode. Now try saving a Facebook product feed again. Wordfence may learn that the communications taking place at this time are normal and will allow them in the future. After you have finished testing, make sure to switch the WAF from Learning Mode back to Enabled and Protecting.
Let me know how you get on!
Peter.
