how did you install the modpack?: launcher and installer
have you installed Java 8?: yes
when does the problem happen?: connecting to the server
Since this morning, I get “fatally missing blocks and items” message when I try to connect to the server, and I don’t changed anything since my last (successful) connection.
Do you have an idea?
Thanks 
!
I’m having the same issue, what specifically do I need to do to fix the problem? (I’m not very tech-savvy)
Enable modpack updates in the launcher.
Well, that didn’t work for me, it was checked since the beginning and the launcher never downloaded updates.
Right click -> force update worked, though.
Well, the update post on the forums here does say you need to force update it.
unable ‘force update’, will try to uninstall and reinstall ardacraft
I’m using the installer on my mac and have the same problem. i can’t get on the server. How do i fix?