ScrollMagic & GreenSock combo

Below is a copy of the error that I'm receiving during a gatsby build. Local server works just fine.

  success open and validate gatsby-configs - 0.019s
  success load plugins - 0.376s
  success onPreInit - 0.003s
  success delete html and css files from previous builds - 0.011s
  success initialize cache - 0.007s
  success copy gatsby files - 0.039s
  success onPreBootstrap - 0.008s
  success createSchemaCustomization - 0.005s
  success source and transform nodes - 0.062s
  success building schema - 0.234s
  success createPages - 0.001s
  success createPagesStatefully - 0.038s
  success onPreExtractQueries - 0.001s
  success update schema - 0.028s
  success extract queries from components - 0.221s
  success write out requires - 0.004s
  success write out redirect data - 0.003s
  success onPostBootstrap - 0.002s
  ⠀
  info bootstrap finished - 2.994 s
  ⠀
  success Building production JavaScript and CSS bundles - 9.744s
  success Rewriting compilation hashes - 0.003s
  success run queries - 9.843s - 3/3 0.30/s
  failed Building static HTML for pages - 1.047s

  ERROR #95313

  Building static HTML failed

  See our docs page for more info on this error: https://gatsby.dev/debug-html


    2 | import { TweenLite as Tween, TimelineMax as Timeline } from "gsap"
    3 |
  > 4 | ScrollMagic.Scene.addOption("tweenChanges", false, function(val) {
      |                   ^
    5 |   return !!val
    6 | })
    7 |


    WebpackError: TypeError: Cannot read property 'addOption' of undefined

    - magic.anim.js:4 Module../src/utils/magic.anim.js
      src/utils/magic.anim.js:4:19

    - index.js:1 Module../src/pages/index.js
      src/pages/index.js:1:1

    - CSSPlugin.js:158 Module._compile
      node_modules/gsap/CSSPlugin.js:158:1

    - CSSPlugin.js:169 Object.Module._extensions..js
      node_modules/gsap/CSSPlugin.js:169:2

Have another more specific idea? You may want to check out our vibrant collection of official and community-created starters.

🚀 Quick start

1. Clone my repo

   Use the Gatsby CLI to create a new site, specifying the hello-world starter.

   git clone git@github.com:mhigley/ScrollMagicGSAP.git

2. Change into directory, install, and run develop

   Navigate into your new site’s directory and start it up.

   cd ScrollMagicGSAP && npm i && gatsby develop

   Your site is now running at http://localhost:8000!

   Note: Node version 12.8.1 may be required to install correctly

   nvm use 12.8.1

3. Run the build to see the errors

   The build errors in both build and serve modes.

   gatsby build

   gatsby serve

   See above for error. Help me Dev Jedis. You're my only hope.