Adding Optifine to Curseforge modpack causes crash issues

[edgyusername]

When trying to add Optifine to a curseforge modpack, it crashes on startup. I've followed tutorials on how to do it and to my knowledge I've done everything right. I am using the correct optifine version for both the version of minecraft and forge. I download optifine from the official website, then drag and drop the jar file into the mods folder of the modpack. I start up the pack and get a crash every single time, regardless of the version of optifine or which modpack I try to install it on. Someone please tell me what I'm doing wrong. 

 

Here is the crash report:

The game crashed whilst there was a severe problem during mod loading that has caused the game to fail

Error: net.minecraftforge.fml.common.LoaderException: java.lang.ExceptionInInitializerError

Exit Code: -1

[edgyusername]

15 hours ago, diesieben07 said:

Post the debug.log.

Thanks for the reply! Unfortunately I'm a noob and don't know how to get that. I've tried googling it but can't seem to get a straight answer. Where can I find the log?

 

[edgyusername]

8 hours ago, diesieben07 said:

In the logs folder of your game directory.

latest.logHopefully this is it.