它运行得很好，直到更早，现在我突然得到这个错误，当我尝试
puppet agent --server *MasterName* --waitforcert 60 --test
。当我尝试yum upgrade puppet时，我无所事事。对此错误有任何帮助吗？
Error: Could not request certificate: Find /production/certificate/ca?fail_on_404=true resulted in 404 with the message: {"message":"Not Found: Error: Invalid URL - Puppet expects requests that conform to the /puppet and /puppet-ca APIs.\n\nNote that Puppet 3 agents aren't compatible with this version; if you're running Puppet 3, you must either upgrade your agents to match the server or point them to a server running Puppet 3.\n\nMaster Info:\n Puppet version: 4.2.2\n Supported /puppet API versions: v3\n Supported /puppet-ca API versions: v1","issue_kind":"HANDLER_NOT_FOUND"}