It appears that the Direwolf20 pack for 1.7 doesn't always download any mods, and just starts up as vanilla Minecraft.
The launcher gives this error when downloading:
There a couple different fixes people have been suggesting so far: Force update the Launcher, or redownload the launcher. Neither worked for me.(Although I might have done something wrong.)
Can somebody figure out what is wrong, and how to fix it?
EDIT: I don't code, but the log seems to say that a certain pack.json file is missing, therefore Forge can't load.