Ok well I downloaded a modpack called Dungeons and dragons and space shuttles, and it worked and i deleted all the mods that didn't work with my forge. Then it says "Minecraft failed to start!" and said the issue was unknown so i clicked "Get link" and it brought me to this website https://paste.dimdev.org/onivaxujid.mccrash

Please help I don't know what is wrong.

 Also my version is  1.12.2 ! it only let me choose 1.115.1 for the affect version, sorry