Debugger wont connect to NIOS II hello world on Cyclone GX development board

My evaluation board was refusing to configure so I haven't been able to try anything (see https://community.intel.com/t5/FPGA-SoC-And-CPLD-Boards-And/Is-my-Cyclone-10-GX-development-kit-board-faulty/m-p/1544844/emcs_t/S2h8ZW1haWx8dG9waWNfc3Vic2NyaXB0aW9ufExQMjhJS05NSjZaWFBYfDE1NDQ4NDR8U1VCU0NSSVBUSU9OU3xoSw#M26394)

It configured this morning so I'll see if I can make any progress with the NIOS.

I did the NIOS platform from scratch because I've never found an example that didn't need a load of changes just to get it to compile with my installed version of Quartus. I've been using the Trenz Cyc1000 NIOS with reasonable success apart from booting from off chip memory, https://community.intel.com/t5/Programmable-Devices/Autostart-NIOS-from-external-SDRAM-problem/m-p/1509971#M91900 which I just gave up on.

No change, not sure what else I can say. It's really hard to capture any messages because they get over-written. Waiting 24 hours plus is so frustrating, I start each troubleshooting session having forgotten where I'd got to last time.