Having the same issue. I did allow the launcher to bypass my firewall and still nada.
EDIT: Updater finally started to work, but it was very slow. It looks like I'm able to get into the game now.
Some steps I took in addition to allowing the exe through the firewall:
1) delted json files and cache
2) made folder not "read only"
3) restarted the launcher several times after each step