I’m having a similar problem with WordFence and Yahoo Small Business. About 1 month ago, WordFence stopped completing security scans and reported back with the following error code:
error:0D0890A1:asn1 encoding routines:ASN1_verify:unknown message digest algorithm
I talked with Yahoo Small Business tech support today and mentioned what I had discovered after talking with the WordPress tech support and Googling the error code along with “wordpress.”
From WordPress’s servers, it looks like Yahoo is using an outdated version of cUrl or Open SSL. The Yahoo rep reported back that Yahoo uses a customized version of Open SSL and it was up-to-date.
I’m going to try contacting Yahoo Small Business through social media (Facebook messaging) and see if this works any better than the phone call.
Thanks,
Steve