Reading through the documentation I got it to give me a slightly more informative error...

"Error
    at throwServerCallError (<https://5154752-sb1.app.netsuite.com/javascript/suitescript/2.0/client/N.js?NS_VER=2019.2.0&minver=162:15898:16>)
    at Object.handleServerCallError (<https://5154752-sb1.app.netsuite.com/javascript/suitescript/2.0/client/N.js?NS_VER=2019.2.0&minver=162:15914:7>)
    at extractResponse (<https://5154752-sb1.app.netsuite.com/javascript/suitescript/2.0/client/N.js?NS_VER=2019.2.0&minver=162:15963:26>)
    at XMLHttpRequest.xhr.onload (<https://5154752-sb1.app.netsuite.com/javascript/suitescript/2.0/client/N.js?NS_VER=2019.2.0&minver=162:16019:40>)"