For the moment it seems fixed. I deleted the JEI Config file, the Journeymap Server Config file, and disabled both the mods (even while disabled, it would still crash until those config files were gone). They're useful mods and I'd hate to not use it, would just deleting and redownloading the mods work?
Starting today, I am unable to load my modded minecraft world. Forge crash log initially said it was a specific mod called Doggy Talents, which I disabled. Then it blamed JEI, and when that was disabled it blamed another mod so I assume it's something more than a specific mod. Minecraft launcher log claims "Exit Code 1". Nothing had changed since last night when it was working fine
Forge Log: https://pastebin.com/S1GiBGVJ
Client Log: https://pastebin.com/aLwuGUNL