Windows .exe all 1.6.4 modpacks don't work

  • The FTB Forum is now read-only, and is here as an archive. To participate in our community discussions, please join our Discord! https://ftb.team/discord
i was having the same problem but i forced updated and now it does't start the modpack
 
Follow this guide: desk.feed-the-beast.com/index.php?/Knowledgebase/Article/View/9/0/basic-troubleshooting-updated