Well, now that the problem is clear you can fix it.
To fix it you have two options:
1. remove the ssl_inspect_ca certificate currently loaded and replace it with a valid certificate.
CLI command examples:
> clear security pki ca-certificate ca-profile <profile-name>
follow the KB : https://kb.juniper.net/InfoCenter/index?page=content&id=KB31122
This should guide you on how to generate the key pair, certificate etc.
2. If you do not want to load the certificate for now and just get rd of the error. You can simply delete the certificate and its, relevant config.
CLI commands:
> clear security pki ca-certificate ca-profile <profile-name>
> configure
# delete services ssl proxy profile <profile-name>
# commit and-quit
Hope this helps!
Regards,
Kinshuk