The puppet version of server is 6.15.0
The puppet version of client is 3.6.2
The client keeps reporting errors:Could not request certificate :ssl_connect returned =1 error=0 certificate verify failed:signed certificate in certificate chain for /CN=Puppet Root CA:320F52667ac69b]
zsy, the issue is reported for an unsupported puppet-agent version (3.6.2). Please update to an supported version: https://puppet.com/docs/puppet/7/platform_lifecycle.html#about_agent
I'm going to close this out. If you run into cert related problems reach out on slack, as I'm sure folks there can help.