I have error with ssl in cPanel. Cannot certify this certificate

cPanel writes that it cannot certify this certificate. I saw a similar topic and there one solution was to install and add the root certificate either to the general storage of the system CA or to the one used by cPanel. I didn’t understand what and where to add. There was also an answer to add CA Bundle but it did not help me. Therefore, I create a topic.

The RSA Root cert goes into that CA Bundle spot.

It didn’t help me.