Sending Ctrl-C or Cmd key sequence

Sending Ctrl-C or Cmd key sequence

I'm having trouble with unattended access to my macOS machine.  I cannot seem to send any Cmd or Ctrl key sequence (ie Cmd+N, Cmd+C, Ctrl-C, etc).  I use terminal extensively and need too send Ctrl sequences.  Zoho Assist Free from a Win10 PC to a macOS Mojave laptop.  Is there a way to do this, am I just missing something?