Uncaught TypeError: Cannot set property window of #<Window> which has only a getter

[RailsCod3rFuture]

I received this error for the first time tonight. I am using a mixture of webpacker and the asset pipeline for rails. The line thats throwing the error is below

window = ( typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {} );

Have any idea why this is happening?