I deleted most of the contents of my .minecraft folder and restarted the launcher to download the necessary game files in order to do a fresh install. After successfully starting the vanilla minecraft 1.8.9, I reinstalled Forge using the windows installer.
I get a crash to the launcher, but it's not generating a logs/fml-{client/server}-latest.log file.(forge crash log)
This is the error inside the minecraft launcher Game Output tab:
Launcher log Exception:
I don't understand what I could be doing wrong with a fresh install of the game and only using the Forge installer after that (with no mods in coremods & mods folders). Based on the fact that the issue ONLY happens when I try to run Forge (with no mods) and not when I run vanilla minecraft, by default this makes the crash a problem with forge.