I'm getting the error Underfull \hbox (badness 10000) at any chapter name.
Not only those with a long chapter name, such as \chapter{Quantization in Curved Spacetime}, which gets split into two lines, but also with shorter names such as \chapter{Hawking Radiation}
I'm getting the error
Underfull \hbox (badness 10000)at any chapter name. Not only those with a long chapter name, such as\chapter{Quantization in Curved Spacetime}, which gets split into two lines, but also with shorter names such as\chapter{Hawking Radiation}