My friends having this same problem, im currently just sending him my version of my .technic in my app-data folder. He looked in the logs, the launcher is having trouble downloading that specific file. i was having the same problem but i seemed to fix it with persistence and just regular troubleshooting.
EDIT:
Put these files in your .technic folder then launch technic once from temp.exe
https://www.dropbox.com/s/ke9igwjpdauo8z1/modpacks.zip?dl=0