Hi, @Megha
Thank you so much for reaching us and thank for all your patience.
When you go to the debug session (load the program to the flash), do you see a screen like this?

If not, may you share with me the error that is appearing you? So I can help you.
Also, please take in consideration that you have to have installed the Segger J-Link driver and your USB connected in J26 is for transmit-receive data.
Please let me know if the problem persist, you I can help you further.
Best Regards.
Happy NY.
Pablo Avalos.