Error 400

invalid state parameter

BadRequestError: invalid state parameter
    at handleError (file:///C:/Users/admin/source/repos/zoomapps-customlayout-js/server/helpers/routing.js:35:12)
    at file:///C:/Users/admin/source/repos/zoomapps-customlayout-js/server/routes/auth.js:55:14
    at Layer.handle [as handle_request] (C:\Users\admin\source\repos\zoomapps-customlayout-js\node_modules\express\lib\router\layer.js:95:5)
    at next (C:\Users\admin\source\repos\zoomapps-customlayout-js\node_modules\express\lib\router\route.js:137:13)
    at middleware (C:\Users\admin\source\repos\zoomapps-customlayout-js\node_modules\express-validator\src\middlewares\check.js:16:13)

Trying to follow this sample app: zoom/zoomapps-customlayout-js: A simple podcaster Zoom App to demonstrate Immersive Mode through our Layers API (github.com)

Any help is greatly appreciated.