No metadata is generated

[minecraftchest1]

I have a project at https://gitlab.com/minecraftchest1/nuget-packages/-/tree/docfx in the utils directory that I am attempting to get DocFX to work on. However, every time I try, Visual studio gives me the following output, and the API docs are never built.

Rebuild started...
1>------ Rebuild All started: Project: utils, Configuration: Release Any CPU ------
1>C:\Users\...\source\repos\nuget-packages\utils\minecraftchest1.cs(76,29,76,30): warning CS0168: The variable 'e' is declared but never used
1>utils -> C:\Users\...\source\repos\nuget-packages\utils\bin\Release\net5.0\utils.dll
1>[21-05-27 05:13:22.554]Warning:[MetadataCommand.ExtractMetadata]No metadata is generated for utils.
1>
1>
1>Build succeeded with warning.
1>[21-05-27 05:13:25.266]Warning:[MetadataCommand.ExtractMetadata]No meta
data is generated for utils.
1>	1 Warning(s)
1>	0 Error(s)
1>Successfully created package 'C:\Users\...\source\repos\nuget-packages\utils\bin\Release\Minecraftchest1-utils.1.0.0.2.nupkg'.
1>Done building project "utils.csproj".
========== Rebuild All: 1 succeeded, 0 failed, 0 skipped ==========