Immediate crash upon clicking "Play" (OPTIFINE RELATED)

I'm using OptiFine, the latest version. The game crashes immediately when I try to launch the game. Clicking "Play" instantly reloads the session. A reinstall of OptiFine, Minecraft, as well as graphics drivers did not solve the issue. I've attached both output logs (TXT).

3999 debugs5 infos2 warnings
07:54:58 launcher Preparing to launch minecraft client for 1.12.2-OptiFine_HD_U_C5
07:54:58 launcher Couldn't get hash for optifine/OptiFine/1.12.2_HD_U_C5/OptiFine-1.12.2_HD_U_C5.jar from https://libraries.minecraft.net/optifine/OptiFine/1.12.2_HD_U_C5/OptiFine-1.12.2_HD_U_C5.jar.sha1: HTTP 404: Not Found
07:54:58 launcher Have local file C:/Users\Sean\AppData\Roaming\.minecraft\libraries\optifine/OptiFine/1.12.2_HD_U_C5/OptiFine-1.12.2_HD_U_C5.jar but don't know what size or hash it should be. Have to assume it's good.
07:55:06 launcher Checking installations.
07:55:06 launcher Minecraft client 1.12.2-OptiFine_HD_U_C5 is ready to start.
07:55:06 launcher Starting!
07:55:06 launcher Using default game log configuration client-1.12.xml (outputs XML)