unkman

admin-ajax.php I think belong to theme. Thank you for the help

Tried another but get the same problem. Could it be because of using Divi Theme?

Hello. I try to clear all cache manually in the plugin. Also in a browser (chrome). Error appear all the time and did not disrepair as I turn on plugin. And I did notice that if I am logged in as an admin there is no 403 error. Only if I visit site as a guest.