Resolved Self-Signed certificate

[Bénédicte]

Hello,
I have a question. When I use my auto-signed plesk certificate, I have an error. Is it possible to no longer have this error on my server name?



My story : I first installed a debian 9, and my self-signed certificate did not show me error (I swear!). I reinstall a centOS7 and now I have a warning. Can you tell me how this is possible, and how to fix it? (without installing the certificate on a domain name and linked to my server ...)

Thank you !

 

[MarkM]

Self-signed certs are not trusted....

Secure the panel with a Let's Encrypt cert.....