View Source Routex.Extension.Alternatives.Exceptions.MissingRootSlugError exception (Phoenix Routes Extension Framework v0.3.0-alpha.4)

Raised when the branch map does not start with the root branch "/".

%{
  branches: %{
    "/first"  =>    %{attrs: %{key1: 1}},
    "/other"  =>    %{attrs: %{key1: 1}}},
}

To fix this, include a branch for the root "/".

`%{
  branches: %{
    "/" => %{
      attrs: %{level: 1}
      branches: %{
        "/first"  =>    %{attrs: %{level: 2}},
        "/other"  =>    %{attrs: %{level: 2}}
      }
    },
  }
}