Nios2 debug dosen't start

Hi

It seems like you did not create the Nios2 preprely.

From the jtag scan, the nios2 is not present.

I would suggest you to follow the steps below in creating a simple hello world design:

https://www.intel.com/content/dam/support/us/en/programmable/support-resources/fpga-wiki/asset02/nios-ii-hello-world-a10.pdf

Regards

Jingyang, Teh