'Why are all the methods in Assembly-CSharp.dll empty?

I have recently decompiled the GameAssembly.dll from Among Us using Il2CppDumper-v6.7.6

My problem is that while i have the file Assembly-CSharp.dll open with dnSpy, all of the methods/functions are empty, as shown below,

enter image description here

Does anyone know how i can fix this and see the methods/functions?



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