but no follow-on seen.
Which is a bit odd.
Presumably the brickfixV2 digicap.dav is still in the tftpserve.exe folder.
A bit of a long shot, for no real reason - your PC is extremely chatty on IPv6 - maybe temporarily disable IPv6 and see if that changes anything.
Also - if the camera isn't currently bricked, you should be able to use the web GUI as normal to do a firmware update using the brickfixV2 firmware (probably the EN header version), via the maintenance menu with the PC IP address as normal.
Then after the update is complete, change the PC IP address to 192.0.0.128 and proceed to Stage 2.
I can't get to it via web, batch updater or any hiktools - even when I had no web interface on the old bricked cameras I could get rstp, but not this one.
turned off ipv6 - similar result - just the "test tftpservier"
yes, the brickfixv2 digicap is still in the tftp server - seems to be failing its tftpserver test...