So I'm pretty new to the modding scene, let alone Minecraft in general. Ive installed optifine before and it seemed to have worked okay but that was a while ago.
ANYWAYS, I'm trying to install flans mod and I've got through most of the installation process (I'm following this guide: https://youtu.be/ZC5FYqogi74) until I get to the part where i open the Forge profile (5:36 in the video https://youtu.be/ZC5FYqogi74?t=5m36s) and Minecraft opens for a split second, then crashes. The launcher pops up and will give me this error:
So I'm really confused on what to do and some help would be very much appreciated.