403 error when checking favicon

Hi, I have gone through the process of creating my favicons, but when checking them using the “check your favicon” link, I receive the message “The access to https://www.sanefcs.com/ was forbidden (403).”

I am using version 1.3.20 of the plugin on WordPress 5.6. My host is Siteground (I saw a few previous issues related to HostGator).

For security, I use Defender and Wordfence. As a test, I turned both off, regenerated my site cache, and retested, I received the same error.