Failure to start hex

I recently ran into the following error when trying to run any mix command:

## The error

```
Could not start Hex. Try fetching a new version with "mix local.hex" or uninstalling it with "mix archive.uninstall hex.ez"
** (MatchError) no match of right hand side value:

    {:error,
     {:hex,
      {{:shutdown,
        {:failed_to_start_child, Hex.State,
         {:EXIT,
          {%SyntaxError{
             file: "nofile",
             line: 10,
             column: 41,
             snippet: "                  oauth_exchange => true},",
             description: "unexpected token: }"
           },
           [
             {Code, :validated_eval_string, 3, [file: ~c"lib/code.ex", line: 628]},
             {Hex.Config, :decode_elixir, 1,
              [file: ~c"lib/hex/config.ex", line: 97]},
             {Hex.Config, :read, 0, [file: ~c"lib/hex/config.ex", line: 12]},
             {Hex.State, :start_link, 1, [file: ~c"lib/hex/state.ex", line: 135]},
             {:supervisor, :do_start_child_i, 3,
              [file: ~c"supervisor.erl", line: 996]},
             {:supervisor, :do_start_child, 3,
              [file: ~c"supervisor.erl", line: 982]},
             {:supervisor, :"-start_children/2-fun-0-", 3,
              [file: ~c"supervisor.erl", line: 966]}
           ]}}}}, {Hex.Application, :start, [:normal, []]}}}}

    (hex 2.3.0) lib/hex.ex:5: Hex.start/0
    (mix 1.19.5) lib/mix/hex.ex:64: Mix.Hex.start/0
    (mix 1.19.5) lib/mix/dep/loader.ex:193: Mix.Dep.Loader.with_scm_and_app/5
    (mix 1.19.5) lib/mix/dep/loader.ex:145: Mix.Dep.Loader.to_dep/4
    (elixir 1.19.5) lib/enum.ex:1688: Enum."-map/2-lists^map/1-1-"/2
    (mix 1.19.5) lib/mix/dep/loader.ex:368: Mix.Dep.Loader.mix_children/3
    (mix 1.19.5) lib/mix/dep/loader.ex:22: Mix.Dep.Loader.children/1
    (mix 1.19.5) lib/mix/dep/converger.ex:101: Mix.Dep.Converger.all/4
```

Being trying to figure it out including uninstalling and reinstalling elixir and erlang versions using asdf but nothing fixes it.

Any help in resolving this will be appreciated.