Hi, @bangerous
Hoping you find well and thank you for your patience.
I was checking your issue, and I would like to ask for you, did you install succesfully the Segger J-Link Driver in your computer? Because the main problem is when you did not install correctly the drivers, your computer is not detecting the target. Please be sure firstly, that your frdm board has a bootloader by holding the reset button and then connecting your frdm board to the pc, so you can make sure that you have the .bin there from OpenSDA for your specific frdm board (if not, you can download it from here: https://www.segger.com/downloads/jlink/#JLinkOpenSDABoardSpecificFirmwares)
Please let me know if you have more problems.
Thank you.
Best Regards.
Pablo Avalos.