Digicert pending validation virus_total

[aleks.brozgalov]

What is the name of the domain?

xn–kgiekspert-ecba.ee

What is the error number?

SSL_ERROR_NO_CYPHER_OVERLAP

What is the error message?

SSL_ERROR_NO_CYPHER_OVERLAP

What is the issue you’re encountering

My site is down.

What steps have you taken to resolve the issue?

Turning on/off Universal SSL, reconfiguring origin server, changing encryption modes

Was the site working with SSL prior to adding it to Cloudflare?

Yes

What is the current SSL/TLS setting?

Full

Screenshot of the error

[aleks.brozgalov]

Something happened with SSL, and now my Universal certificate is pending validation, but errored out, because one vendor marked it as malicious, although there was nothing extraordinary on my site. I already contacted that vendor, but haven’t got an answer from them yet. Meanwhile I spotted that my SSL certificate vendor is DigiCert, although it seems that Cloudflare has deprecated them. How do I transfer myself to Letsencrypt certificates or complete the validation?