Crash when trying to open extreme sound muffler gui

[Deleted user]

Versions
Indicate the versions for:

• Extreme sound muffler 3.5
• Forge 35.1.6
• Additional mod(s) (If bug is due incompatibility)

Describe the bug
Crash when attempting to open extreme sound muffler

To Reproduce
Steps to reproduce the behavior:

1. Go to inventory
2. Click on extreme sound muffler icon
3. Crash

Expected behavior
Opening the extreme sound muffler gui

Screenshots or Crashlog
https://pastebin.com/x1d3Z8kk

Additional context
In all the mods 6 1.4.0 modpack