Cloudflare 526. —STST SSL-1999.
Domain : Web. & TLSPriority: High
What does this error mean?
Cloudflare considers the certificate of the server of which is invalid in strict mode.
Probable causes
- certificate expired
- name of absent host.
- incomplete chain.
Verification and resolution
- Check SAN.
- Control complete chain.
- Test date and authority.
Precaution: Correct the certificate of origin rather than reduce validation.
← Return to the basis of the codes of error
Quick diagnostic.
To diagnose Cloudflare code 526 in the Web domain. & TLS, start with the following check: Check SAN. Then compare the result to this probable cause: certificate expired. Save the context and time of appearance to compare the behavior before and after correction. Priority level indicated: High.