The load and mgrload commands:
"load" is used for loading modules into netconfd-pro
"mgrload" is used for loading modules into yangcli-pro
When using yangcli-pro, the load command is used to load a YANG module into the server.
After using the load command, the mgrload command may also be needed to load the module into yangcli-pro and keep the current yangcli-pro session synchronized with the server.