When "mos license" command executed getting is error "Is RPC UART enabled?" though port is connected to esp32 and recognized

If you are asking a question, please follow this template:

  1. My goal is: get rid of rpc_uart issue
  2. My actions are: checked serial port connection to esp32. working fine.
  3. The result I see is: when “mos license” command executed, it queries device and asks whether port is correct and rpc_uart is enable. i have enabled it in mos.yml
  4. My expectation & question is: it should work without any issues