How to add a self-signed certificate to browsers?

Question

Google Chrome

Hello!
I'm trying to create and add a self-signed certificate to the Google Chrome browser, but when adding an error:

The private key for the client certificate is missing or invalid.

The certificate is created using the command:

openssl req -new -sha256 -newkey rsa:2048 -nodes -keyout server.key -x509 -days 365 -out server.crt

Without adding, the browser swears at the certificate.
How to win?

Answer 1

If you add it as a client certificate, that is, for further use for client authentication, then you need a p12 / pfx file, which also contains the private key. You can make it from the private key and certificate using the openssl command.
If you need to add a server certificate, then you just add it in the wrong place. You need to add not to personal certificates, but to trusted root certification authorities.

Answer 2

Show host configuration. Maybe there is an error.

Answer 3

The CA keys are added to "Trusted Root Certification Authorities". And you seem to be trying to add to your private keys.