SSL certificate renewal failing

Thanks for your previous reply.

I did find a page with instructions at How to create the CNAME records for free SSL, plus a video at “Add CNAME records with InfinityFree”.

However, the various instructions seem to conflict. When I follow one set of them, I get

_acme-challenge.honoringhomer.net.honoringhomer.net.

to put into the record box. If I put

_acme-challenge.honoringhomer.net.

the error message returns that it’s a duplicate — of course, since I’m renewing.
(The periods should be removed when entering info into the entry boxes.)

Is
_acme-challenge.honoringhomer.net.honoringhomer.net the correct entry into the “Source” box on the CNAME records page? The response to my request for an SSL certificate is taking a long time.