Error: A cross-origin error was thrown. React doesn’t have access to the actual error object in development. See https://fb.me/react-crossorigin-error for more information.
I don’t get this error after a netlify build/deploy. The link above notes that WebPack can decide to use
eval expressions, which can trigger this error. I suspect that is the problem. This started to happen when using localStorage that had JSON serializer/reviver functions.