Kuba Sękowski

+1 I'm also experiencing this issue. @pickfire did you find any solution?

Update: I've found a quick workaround that works for me. Add ``` (window as any).global = window; ``` to your `polyfills.ts`. Ref: https://github.com/angular/angular-cli/issues/9827#issuecomment-386154063

+1 @jacekv have you found a way to add a custom HTTP header to the AppSync requests?