I see “ttrUSB0” in your reply, but I’m assuming this is just a typo. If not, then spelling “y” instead of “r” should solve it.
The device numbering on the PC depends in part on detecting the serial UART, but the actual numbering may be bumped if there is more than one device (e.g., it might be “/dev/ttyUSB1”). There are also some devices which rename this, e.g., you might have an ACM brand device creating “/dev/ttyACM0”. One trick is to monitor “dmesg --follow” on the host PC, and then connect the USB serial device to see what messages it shows.