Arduino and vesc integration issue

I am having an issue where I have connected a Arduino MKR1400 with the VESC 6 MKv5 and I am having issues with the data being streamed. I am using the code by Solidgeek from the link: VescUart/getVescValues.ino at master · SolidGeek/VescUart (github.com). The issue is I always see Failed to get data when the TX pin of the VESC is connected to the RX pin of the MKR1400 and the RX pin of the VESC is connected to the TX pin of the MKR1400. I am supplying the input voltage to the Arduino using the USB and not from the VESC as I would like to see the output. Can you please help me with that.
Thanks