Issues running `mix docs` - (UndefinedFunctionError) function Makeup.Application

Questions & Help Questions
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I am having issues running mix doc all of a sudden though I did not make a lot of changes to my library codepagex for a long time. I am getting:

codepagex (master *) % mix docs

23:09:22.795 [notice] Application makeup exited: exited in: Makeup.Application.start(:normal, [])
    ** (EXIT) an exception was raised:
        ** (UndefinedFunctionError) function Makeup.Application.start/2 is undefined (module Makeup.Application is not available)
            (makeup 1.1.2) Makeup.Application.start(:normal, [])
            (kernel 10.0) application_master.erl:295: :application_master.start_it_old/4

23:09:22.802 [notice] Application nimble_parsec exited: :stopped

23:09:22.802 [notice] Application earmark_parser exited: :stopped

23:09:22.802 [notice] Application eex exited: :stopped
** (MatchError) no match of right hand side value: {:error, {:makeup, {:bad_return, {{Makeup.Application, :start, [:normal, []]}, {:EXIT, {:undef, [{Makeup.Application, :start, [:normal, []], []}, {:application_master, :start_it_old, 4, [file: ~c"application_master.erl", line: 295]}]}}}}}}
    (ex_doc 0.33.0) lib/mix/tasks/docs.ex:337: Mix.Tasks.Docs.run/3
    (mix 1.16.3) lib/mix/task.ex:478: anonymous fn/3 in Mix.Task.run_task/5
    (mix 1.16.3) lib/mix/cli.ex:96: Mix.CLI.run_task/2
    /opt/homebrew/bin/mix:2: (file)

My project is here: codepagex/mix.exs at main · tallakt/codepagex · GitHub

Appreciate any help, I’m totally lost here…