What could be the cause of the ssl error?

Question

Browsers

Good afternoon, I noticed such a problem, the ssl status of one site has different status for different users, I can’t understand what is the reason, you can tell what is the cause of this error

version v3 signature algorithm
sha256rsa signature hashing
algorithm sha256
public key rsa2048
algorithm typo sha1

Answer 1

Added test results, can you tell me where to look for outdated ciphers?
and how to apply modern?

Answer 2

the page definitely does not contain external content that is loaded via http?

Answer 3

The first screenshot is about the fact that something is loaded on the page via http (image, css, js)