Compilation issue Elm-Brunch: "split" from undefined

My elm code ( https://github.com/puruzio/seat_saver ) works fine in Elm Reactor and compiles well with elm-make, but when I compile it with brunch, I get the following error. This does not give me much clue as to where to fix the error.

My-MacBook-Pro:seat_saver_old puruzio$ brunch build Elm compile: Main.elm, in web/elm, to ../static/vendor/main.js [BABEL] Note: The code generator has deoptimised the styling of "web/elm/app.js" as it exceeds the max of "100KB". [BABEL] Note: The code generator has deoptimised the styling of "web/elm/elm.js" as it exceeds the max of "100KB". 05 Mar 16:16:51 - info: compiling 05 Mar 16:16:54 - error: [TypeError: Cannot read property 'split' of undefined] 

My project is based on the example found here http://www.cultivatehq.com/posts/phoenix-elm-10/ , to which I am trying to add several modules to separate files.

brunch-config.js

 exports.config = { // See http://brunch.io/#documentation for docs. files: { javascripts: { joinTo: "js/app.js" }, stylesheets: { joinTo: "css/app.css" }, templates: { joinTo: "js/app.js" } }, conventions: { assets: /^(web\/static\/assets)/ }, // Phoenix paths configuration paths: { // Dependencies and current project directories to watch watched: [ "deps/phoenix/web/static", "deps/phoenix_html/web/static", "web/static", "test/static", "web/elm" ], // Where to compile files to public: "priv/static" }, // Configure your plugins plugins: { babel: { // Do not use ES6 compiler in vendor code ignore: [/web\/static\/vendor/] }, elmBrunch: { //<<<<<<<< Here is the elmBrunch configuration elmFolder: 'web/elm', mainModules: ['Main.elm'], outputFolder: '../static/vendor' } } , modules: { autoRequire: { "js/app.js": ["web/static/js/app"] } }, npm: { enabled: true } }; 
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You can add the following in the plugins section - babel in your brunch-config.js

 compact: false 

i.e.

 plugins: { babel: { // Do not use ES6 compiler in vendor code ignore: [/web\/static\/vendor/], compact: false }, elmBrunch: { //<<<<<<<< Here is the elmBrunch configuration ... } } 
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Source: https://habr.com/ru/post/1244488/


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