Are you using a legitimate launcher and Minecraft account: yes. Are you using a computer with 8GB or more of RAM? (How to check): yes. Are you using Java 8, 64-bit? (How to check): Ever since ...

I wanted to switch out the No Recipe Book mod in my modpack for FastWorkbench, but for some reason, it does not successfully disable the recipe book (unlike No Recipe Book which does make it go poof).