It looks like you are using an unsupported modified version of the game

[Shadow_wolf_pack]

this keeps coming up every time i try running minecraft!

Edited March 8, 2019 by Shadow_wolf_pack

[Cadiboo]

The most likely cause of this is that one of your mods requires a Forge version over 2779 in which that method was added. You're using Forge 2772. I recommend that you update Forge. This may not be the cause of your error though. 

13 hours ago, diesieben07 said:

Post your debug log as described in the EAQ.

 

Edited March 10, 2019 by Cadiboo
fix version typo