Conan Scene control entries not being added

Uncaught TypeError TypeError: controls.push is not a function
    at getButtons (/home/muttley/projects/foundryvtt-conan2d20/system/src/menu/ConanMenu.mjs:7:12)
    at #call (localhost꞉31004/scripts/foundry.mjs:23656:20)
    at callAll (localhost꞉31004/scripts/foundry.mjs:23615:17)
    at #prepareControls (localhost꞉31004/scripts/foundry.mjs:118510:13)
    at _configureRenderOptions (localhost꞉31004/scripts/foundry.mjs:118415:89)
    at #render (localhost꞉31004/scripts/foundry.mjs:27011:10)
    at #try (localhost꞉31004/scripts/foundry.mjs:7145:23)
    at <anonymous> (localhost꞉31004/scripts/foundry.mjs:7118:16)
    at add (localhost꞉31004/scripts/foundry.mjs:7116:12)
    at render (localhost꞉31004/scripts/foundry.mjs:26983:28)
    at initializeUI (localhost꞉31004/scripts/foundry.mjs:167897:17)
    at setupGame (localhost꞉31004/scripts/foundry.mjs:167673:10)
    --- await ---
    at #initializeGameView (localhost꞉31004/scripts/foundry.mjs:169099:16)
    at _initializeView (localhost꞉31004/scripts/foundry.mjs:169076:40)
    at initialize (localhost꞉31004/scripts/foundry.mjs:167582:16)
    --- await ---
    at window.addEventListener.once (localhost꞉31004/scripts/foundry.mjs:179512:25)